Loki, God of Trickery

At the beginning of combat on your turn, you may exile target creature an opponent controls. If you do, Loki becomes a copy of that creature until the end of combat. Return the exiled creature to the battlefield tapped under its owners control at the end of turn.

{u}{b}{r}: Create a token thats a copy of a creature exiled with Loki. Its an Illusion in addition to its other types and gains, when this creature becomes the target of a spell, sacrifice it. Activate this ability only once during each of you