Matt, The Unbridled Rage

-5: All target creatures gain Trample and Deathtouch.
+1: Matt, The Unbridled Rage, strikes for X/X damage, where X is the amount of mana spent to cast him.
-20: Target player exiles half his deck. Player who owns Matt, The Unbridled Rage, takes half of their starting life points as damage, rounded down.