Four Symbols Seal (Earth-2356)

This technique requires a great deal of talent to perform. The user applies the seal's formula to an object or a body, sealing a large enemy or object within them. If two Four Symbols Seal are used, a stronger seal is created; this is called the Eight Trigrams Sealing Style. If the Four Symbols Seals do not completely overlap with each other, this allows the enemy's midi-chlorians to merge with whoever they've been sealed into. This is how the Nine-Tails was sealed into the body of Anakin Skywalker and later Luke Skywalker.

The Four Symbols Seal is based on the fuinjei of the Uzumaki Clan. According to Kira Bi, it was stronger than the Iron Armour Seal used to seal the Eight-Tails within him. The Four Symbols Seal is also left on the stomachs of those who perform the Dead Demon Consuming Seal.

Source

 * https://naruto.fandom.com/wiki/Four_Symbols_Seal