Adric, Mathematical Genius 
Legendary Creature — Human Artificer
, 
: Copy target activated or triggered ability you control. You may choose new targets for the copy.
Ultimate Sacrifice — , Sacrifice Adric: Counter target activated or triggered ability.
Doctor's companion (You can have two commanders if the other is the Doctor.)
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL