Impa, Illusory Bodyguard

Commander ninjutsu {w}{u}{b}
Whenever Impa, Illusory Bodyguard deals
combat damage to a player, create a 1/1 blue
Illusion creature token. It has "When this
creature enters the battlefield, choose
target creature. While this creature is on the battlefield, the chosen creature has hexproof.
When this creature becomes the target of a spell
or ability, sacrifice it."