Fūinjutsu

are a type of jutsu that seal objects, living beings, chakra, along with a wide variety of other things within another object. An imbalance is created when an odd-numbered seal is placed on top of an even-numbered seal and vise-versa. A seal will remain active even after the creator's chakra has been expanded, as it feeds off of a set amount of chakra placed in the seal during the activation. Breaking of any part of a seal, whether by placing another seal over or on another seal, by erasing part of the seal, or by marking over part of that seal.