Kessenju

Kessenju (決戦獣), formerly known as Kessenju! (決戦獣!) until 2007, and also known in the US as Kessenju!: Ultimate Battle Beasts, is a media franchise by ACS consisting of a manga, several anime series, a trading card game, and several video games.

Kessenju began life as a manga series by Hideaki Terasaki, which was serialized in Kodansha's Comic BomBom magazine, and ran from November, 2001 until April, 2006. It follows the story of a 12-year old boy named Sendo Tenryu, who aspires to be the best duelist there is. Since then, four sequel series have been made, each starring a new protagonist. An animated adaption of the first series, Kessenju!: Ultimate Battle Beasts, was later produced by Nippon Animation and ran from 2003 to 2006.

The Kessenju trading card game was developed and published by ACS, and was launched in December, 2001 in Japan and August, 2004 in North America. In North America, the Kessenju trading card game was distributed by Topps up until 2007, when it was discontinued due to dismal sales numbers. As of this writing, the North American version of the game is out of print, and the game is now only available in Asia, and only printed in Japanese.

Gameplay
In Kessenju, players draw cards from their respective decks and take turns playing cards onto the field, with the main goal of the game being to use creature attacks and spells in order to attack each other until one of them wins. A game of Kessenju is typically played between two players. Each player must use a deck containing at least a minimum of 40 cards, which the player can increase up to a maximum of 60 cards, as well as a maximum of 3 copies of the same card in a deck (barring several "restricted" cards, which only allow one copy for each deck). Before each match, both players would decide who gets to play first using a coin toss.

Players starts the game with 2000 "Health Points" (HP), as well as five "Barrier" cards and an empty "Mana Pool", which is the main resource of the game. For every turn, each player must sacrifice at least one card in their hand, into their mana pool per turn, which constitutes to one mana point. Unlike in Magic: The Gathering (and like in Duel Masters), any card can be used as a sacrifice, be it a Creature card, Spell card, Equip card or Arena card. This gives the game more flexibility against "dead draws", at the price of forcing players to make decisions on which cards should be sacrificed, and which ones to keep.

Putting cards into play requires tapping (done by rotating the card 90 degrees, indicating that it has been used that turn) a certain amount of mana, including at least one mana from the same color, or Realm, as with the card that the player uses. More powerful cards cost more mana, so as the game progresses, more sacrifices will be in play, more mana will be available, and the quantity and relative power of the Creatures, Spells and Equips played tends to increase.

Players begin the game by shuffling their decks and then drawing five cards. On each player's turn, following a set phase order, they draw a card, tap their sacrifices as necessary to gain mana as to summon creatures, cast spells and/or equips, engage their creatures in a single attack round against their opponent or their creatures, who may use their Defense position creatures or trigger their Barriers to block the attack, and then complete other actions with any remaining mana, before ending their turn. Tapped resources remain tapped until the start of the player's next turn, so the player must also plan ahead for their opponent's turn. The standard order of phases in a turn goes: Draw Phase > Neutral Phase > Main Phase 1 > Attack Phase > Main Phase 2 > End Phase.

During the attack phase, players compare their creature' Attack (when attacking an Offense Position creature) or Defense points (when attacking a Defense Position creature), which usually comes in values around the hundreds. When the target creature is in Offense position, and the attacking creature has higher Attack points than the target creature, the target is destroyed, and vice versa, with any excess damage being dealt to the defending player's HP instead. When both creatures have the same amount of Attack points, both are destroyed. Creatures in Defense position are unable to destroy opposing creatures, but are able to avert excess damage to the player's, even after being destroyed by a creature with greater Attack points. When the defending creature has more Defense points than the opponent's attacking creature's Attack points, excess damage is reflected it to their opponent instead. When both the attacker and defender have the same amount of Attack and Defense points, respectively, none of the creatures are destroyed.

When dealt with a bad hand at the start of the game, the player is given an opportunity to "mulligan" their starting hand, which allows players to shuffle an unsatisfactory opening hand back into the deck at the start of the game, draw a new hand with the same number of cards, and repeat until satisfied. To dissuade players from abusing this rule, their opponent may choose to draw one additional card for every mulligan performed.

A typical Kessenju setup consists of the playing field, where players can place their creatures and Spell cards, a the mana zone, where cards sacrificed for mana are placed and tapped for usage, and the Barrier zone, which consists of five face-down cards waiting to be triggered. When a player's creature or Spell card is destroyed either through battle or after usage, they are sent into the "graveyard". Certain Spell cards allow players to steal cards to from the graveyard, and transfer them onto their own hand for their own use. Alternatively, certain creatures and Spell cards have effects that cause cards to be "banished", leaving them unplayable for the remainder of the game. There is also an Arena slot, where Arena cards are placed once it is played.

The game ends when:


 * One of the players' HP is reduced to zero. If both players reach zero HP at the same time, the game ends in a draw.
 * One of the players has to draw from an empty deck.
 * One of the players forefeits, automatically landing a win for the opposing player.
 * Certain cards with special conditions which trigger automatic win or loss conditions, are put into play, provided that the cards' requirements are filled.

Barrier System
One of Kessenju's distinguishing core mechanics is its Barrier system, where players can set up five cards in advance and summon them in the middle of the match, allowing them to counter against their opponents' powerful creatures and spells.

At the start of the game each player possesses five "Barriers", which consists of five Creature or Spell cards of the player's choosing. During the opponent's attack phase, players can activate a Barrier Trigger, and use the card's effect anytime during an opponent's turn to save themselves or their creaturess from damage, at the price of being unable to sacrifice cards for mana for one turn. Certain creatures and Spell cards are also meant for breaking the opponent's Barriers, rendering them unable to use Barrier Trigger. Other Spell cards allow players to install aditional Barriers with cards from their hand, while others have the inverse effect, taking one of their own Barriers and put them on their hand.

Summoning a Creature card through Barrier Trigger automatically puts the summoned creature at Defense position, shielding the player or a targetted creature from any potential damage. If the summoned creature remains on the field, the player may then choose to have it remain on Defense or switch it over to Offense position and use it for attacking. Summoning a Spell card through Barrier Trigger would activate the card's effect as if it were summoned from the hand.

Cards that can be used as Barriers are distingused by a "Barrier" logo on the bottom left of the card. Several cards, most notably Counter Spell cards, creatures with high Defense or "on flip" effects (which are activated when the creature is summoned from face down position), benefit from being used as Barriers. There also exist several Counter Spell cards that are specifically meant to be used as Barriers. This gives the game an added layer of strategy, giving the player flexibility regarding which Barrier cards to use for the duel, and when to trigger them.

Conversely, several cards cannot be used as Barriers due to either impracticality or potential as game-breakers. These inlcude all Equip and Arena cards, most high-cost Spell cards (barring high-cost Counter cards), all Evolved Creature cards, and any Creature card with a casting cost of 4 or more mana.

Card Types
The game features four types of cards: Creature, Spell, Equip or Arena, each with their own specifications and uses.

Creature Cards
Creature cards are summoned by each player to attack the opposing player's creatuess or HP, or defend against the opponent's attacks. Each creature represents a certain race (Wyvern, White Mage, Dark Mage, Elf, etc.), and typically has a set amount of Attack and Defense points (usually a value between 100 and 800, creatures with 850-950 points were later introduced in later expansion sets), which are used to determine the results of battles. Certain Creature cards also have varying special effects, which tend to be unique with each creature.

Players can place their Creature cards in the Offense position, when they plan to use their creature for attacking, or in the Defense position (by rotating the card 90 degrees, as with tapping mana) when they plan to have the creature defend against enemy attacks. Players can also place Creature cards face up, for instant usage, or face down, when they seek to catch their opponents off-guard and take them by surprise. Creatures with "on flip" effects activate their effects this way.

Low cost (3 and below) creatures can be used as Barriers, where they can be summoned onto Defense position in response to the opponent's attack, to shield the player from the attack or trigger an effect. Creatures that benefit from being used as Barriers the most include "blockers" (Defense-centric creatures with high Defense points) and creatures with "on flip" effects (activated after being played face down). Creatures with a mana cost of 4 and above cannot be used as Barriers.

The Evolved expansion set introduces "Evolved Creatures", creatures which require a creature of the same type in the field, wich would then have to be sacrificed in order to summon the Evolved Creature. Evolved Creatures tend to be stronger than regular Creatures of the same mana cost, or possess powerful effects. Evolved Creatures cannot be used as Barriers, regardless of cost.

Spell Cards
Spell cards are magical spells with a variety of effects, which can range from replenishing lost HP, to directly attacking the players, to reviving destroyed creatures, to destroying all creatures on the field, among other effects.

Spell cards come in three varieties:

Spell cards are the most common and useful cards to be used as Barriers, due to their instantaneous effects. Some Counter Spell cards are even built specifically as Barrier cards, and cannot be played from the player's hand like a regular Spell card.
 * Basic Spell cards have a single, one-time effect before they go to the graveyard.
 * Constant Spell cards have effects that remain in play after activation until they are destroyed.
 * Counter Spell cards are Spell cards that are built specifically to negate certain types of Spell cards.

Equip Cards
Equip cards are cards that have to be "equipped" to a face-up creature on the field (hence the name) in order to take effect, after which they then give several advantages to the creature, such as increased Attack and/or Defense points, or immunity from certain types or attacks or spells.

Most Equip cards are usually specific to a certain type of creature, and cannot be used to a creature of another type. For example, "Enchanted Pearl", which is made for White Mage-type creatuees, cannot be used by Wyvern-types, who instead have their own equivalent in the form of "Dragonite". Equip cards cannot be used as Barriers.

Arena Cards
Introduced in the Evolved expansion set, Arena cards are able to change the entire state of play for its controller's or for both players' side of the field, giving several advantages towards cards of a certain Realm. Only one Arena card can be activated at a time, but players can use certain Spell cards to "override" the effect of Arena cards.

There are five basic Arena cards, each representing one of the five Realms of Kessenju:


 * Sunlit Ruins (Light)
 * Dreary Wasteland (Dark)
 * Parched Desert (Fire)
 * Vast Oasis (Water)
 * Gorgeous Eden (Earth)

Hybrid Arena cards were introduced in the Amalgamation expansion set, and give out advantages to cards from two Realms at once. Because of their power, Arena cards are incredibly rare, and certain rulesets outright forbid them from play due to perceived unfair advantages. Arena cards cannot be used as Barriers.

The Five Realms
Each card in Kessenju belongs to one of five "Realms": the Realm of Light, the Realm of the Dark, the Realm of Water, the Realm of Fire and the Realm of the Earth. Each Realm represents an archetype of concepts and virtues, which are reflected on the cards' design. The concepts behind each of the colors of the Five Realms are as follows:


 * The Realm of Light represents light, the beacon of peace and order. Creatures from the Realm of Light consist of human knights, warriors and mages, with some of them showcasing heavy "magitek" influences, and their spells tend to benefit the player or their monsters.
 * The Realm of the Dark represents darkness, a symbol of death and despair. Creatures from the Realm of the Dark consist of zombies, monsters, witches, and other macabre abominations, and their spells often draw from the player's own life source to dish out widespread ruin.
 * The Realm of Water represents water, and its inherent trickery and playfulness. Creatures from the Realm of Water consist of a plethora of sea creatures, as well as wizards with a lot of tricks in their disposal, and their spells rely heavily on draw power and manipulation.
 * The Realm of Fire represents fire, as well as its its sheer power and supremacy. Creatures from the Realm of Fire consist of dragons, goblins, and orcs, among other warmongers, and their spells are often destructive in nature, often causing direct damage or mass destruction.
 * The Realm of the Earth represents nature, the source of life and evolution. Creatures from the Realm of the Earth consists of elves, animals and plant monsters, among others, showcasing the world's flora and fauna, and their spells focus on natural strength and forces of nature.

Besides illustrating their lore and philosophy, the five Realms of Kessenju each form the "cycle of conflict", representing their individual strenghts and weaknesses, as well as their opposition against one another. In gameplay, this is represented by attacks from certain creatures of a certain Realm being stronger when pitted against cards from their rival Realm. Certain creture effects and Spell cards are also meant to work specifically against their specific opposing Realm.


 * Light outshines the Dark
 * Dark contaminates the Water
 * Water douses the Fire
 * Fire burns the Earth
 * Earth absorbs the Light

Most cards in Kessenju represent a single Realm, shown along the card's border. The cost to play them requires at least one mana from said Realm and potentially any amount of mana from any other Realm. Hybrid cards were introduced in the Amalgamation expansion set and their borders are usually a mix of the colors of the two Realms they represent. Their casting cost requires mana from at least two different Realms.

The Five Realms of Kessenju can influence deck construction choices, with hybrid and multi-color decks being common in professional play so as to cover each others' weaknesses. There are no limits to how many colors can be in a deck, but the more colors in a deck, the more difficult it may be to provide mana of the right color.

Product Information
Kessenju trading cards are available in starter decks, structure decks, booster packs, collectible tins, and occasionally as promotional cards.

As in all other trading card games, booster packs are the primary avenue of card distribution. Typically, at least five or nine random cards are found in each booster pack, depending on the expansion set and each set usually contains a larger number of cards, typically around 100-150 different cards per set.

Some cards in the TCG have been released by other means, such as being bundled with video games and issues of Comic BomBom. These cards are often exclusive and have a special type of rarity or are never-before-seen to the public.

Expansion Sets
In its three years of existence in North American market, Kessenju has has had 12 expansion sets released. A 13th expansion set was planned for a 2008 release, before Topps dropped the Kessenju distribution license in November, 2007.

However, this is not the case in Japan, where Kessenju continued to thrive, and is still going strong up to this day, with expansion sets released every three months, on a near-regular basis. From its launch in December 5, 2001 up until at least 2019, there have been over 100 expansion sets released for the Japanese Kessenju TCG.

US Expansion Sets
Note that this list only denotes expansion sets that were released for the US version of the game, which were distributed by Topps, and ran production from 2004 to 2007.


 * Ultimate Battle Beasts (August 19, 2004)
 * Wyverns' Uprising (November 14, 2004)
 * Evolved (February 25, 2005)
 * Great Mage Strife (April 20, 2005)
 * Primordials (July 6, 2005)
 * Warriors and Berserkers (October 18, 2005)
 * Amalgamation (January 19, 2006)
 * Warriors of the Sky (May 2, 2006)
 * Raging Flame / Turbulent Sea / Wrathful Earth (September 23, 2006)
 * Infinite Darkness / Guide Of Light (January 11, 2007)
 * Reign of Chaos (April 29, 2007)
 * Goblins Unleashed (September 8, 2007)

Manga
The Kessenju manga series was written by Hideaki Terasaki, and published by Kodansha, in their Comic BomBom magazine. The original manga series ran from 2001 to 2006, and was compiled into 14 tankoubon volumes. It was then followed by Kessenju REVOLUTION, which ran from 2006 to 2010, which was later followed by Kessenju VICTORY, which ran from 2011 to 2013, after which, the manga took a hiatus until returning in 2015 with Kessenju CLASH, which ran from 2015 up until 2018. There have also also spinoff manga unrelated to the main series. As of this writing, the current ongoing series is Kessenju ACES, which began in April 24, 2019.

The Kessenju manga ran in Comic BomBom up until the magazine's discontinuation in December 2007, after which it moved to Kadokawa Shoten's Kerokero Ace, where it stayed for 6 years until that too was discontinued in 2013. Eventually, the manga moved once again in 2015, to Shogakukan's CoroCoro Comic magazine, where it has stayed ever since. As of this writing, none of manga series have been licensed for the U.S., though fan-made scanlations do exist.

Anime
Main article: Kessenju!: Ultimate Battle Beasts

The first television series, titled simply as Kessenju! originally premiered in Japan on July 20, 2003 and ran until November 26, 2006, spanning three seasons throughout its run. It was then followed by a sequel series, Kessenju REVOLUTION, a sequel series taking place in an alternate timeline which premiered on 2007. REVOLUTION spanned three seasons up until it was concluded in 2010, after which it was succeeded by Kessenju VICTORY, a direct followup to REVOLUTION, spanning three seasons from 2011 to 2014. VICTORY was then followed up by Kessenju CLASH, which ran from 2016 until 2019, spanning three seasons. An animated adaption of Kessenju ACES has been slated for the Summer 2020 anime season. In 2015, a four-episode OVA adaption of Kessenju DD was released.

All three seasons of the first series were licensed for English adaptation, broadcast, and release by Nelvana. Nelvana's dub of the series, entitled Kessenju!: Ultimate Battle Beasts in order to match the card game's localized name, features several visual edits and name changes, in order to better suit an American audience. The series was broadcast on the sibling cable channel YTV in Canada and in ABC Family's Jetix block in the United States in 2004. Nelvana later dropped the license in late 2007 due to dwindling viewership numbers, with the company opting not to license the sequel series Kessenju REVOLUTION.

Video Games
Main article: List of Kessenju video games

Over the years, ACS has published several games based around the Kessenju franchise, mostly ranging from digitized conversions of the card game, to role-playing games featuring characters from the various Kessenju manga and anime series.

Light Novel
Kessenju DD: Duel Diary is a spinoff light novel series written by Hideaki Terasaki for ACS' DokiDoki Bunko light novel imprint, published from 2007 to 2011. It is a sequel to the original manga series, starring the main cast, now having grown up as teenagers, as they rediscover their passion for the game. As it is intended for a much older target demographic than the manga, which was intended for the kodomo demographic, Kessenju DD features several darker elements than its original source material.