Protean Thaumaturge 
Creature — Human Wizard
Constellation — Whenever an enchantment you control enters, you may have this creature become a copy of another target creature, except it has this ability.
Legality
standardNOT LEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL