[Sesame Street] Big Bird, "Bigus Canarius"

Standard Size, Fully Playable Magic The Gathering Commander!

Big Bird, "Bigus Canarius" (Derevi, Empyrial Tactician) -

Flying

Whenever Derevi, Empyrial Tactician enters the battlefield or a creature you control deals combat damage to a player, you may tap or untap target permanent.

{1}{G}{W}{U}: Put Derevi onto the battlefield from the command zone.