Spore Technique

Zetsu is able to plant spores in his opponents' bodies, unbeknownst to the opponents themselves, including high-level shinobi. These spores are time-delayed and, once they're activated, grow into copies of Zetsu's white half. The copies proceed to restrict the targets' movements and absorb their chakra. Since the spores themselves do not contain chakra, they are virtually undetectable by standard shinobi techniques. The absorbed chakra can then be transferred to another individual, provided the copies of White Zetsu are able to make contact with the person whose chakra is to be replenished.