Serpent's Illusion is a technique that appears in Kingdom Hearts Union χ. It allows the user to summon multiple elemental orbs and bombard the enemy with a geyser of fire, then a tornado, then an ice crystal, and finally a bolt of thunder. It is a signature ability of Invi.
Learning Serpent's Illusion
Kingdom Hearts Union χ
Kingdom Hearts χ
Invi uses Serpent's Illusion when fought as a boss.