Keeper of Secrets - 78★ R 40K Foil

First strike, haste
Symphony of Pain — Whenever you cast a spell from anywhere other than your hand, this creature deals damage equal to that spell's mana value to target opponent.
To look upon one is to surrender every last shred of self-will.
rare
Creature — Demon
From the Magic: The Gathering set Warhammer 40,000 Commander.