Eccentric Apprentice
From Adventures in the Forgotten Realms set
Eccentric Apprentice
Creature — Tiefling Wizard
2/2
Flying
When this creature enters, venture into the dungeon. (Enter the first room or advance to the next room.)
At the beginning of combat on your turn, if you've completed a dungeon, up to one target creature becomes a Bird with base power and toughness 1/1 and flying until end of turn.