The Seven Keys and Seven Doors of Holiday Land

In ancient times, the people of Saturnalia, the same ones who created The Seven Crystals of Holiday Land and The Seven Rings of Holiday Land created Seven Keys to fit the Hinterlands's Seven Doors.

Seven Keys and Doors:
 * Valentine's Day Key, which unlocks the heart door
 * Saint Patrick's Day Key, which unlocks the shamrock door
 * Easter Key, which unlocks the egg door
 * Independence Day Key, which unlocks the firework door
 * Halloween Key, which unlocks the pumpkin door
 * Thanksgiving Key, which unlocks the turkey door
 * Christmas Key, which unlocks the tree door