Geomori, Realm of Madness

+1: You must also discard 1 card. Create a Madness token. (It’s an artifact with “Discard 1 card, Sacrifice this artifact: Add one mana of any color.
+2: Take control of target creature until end of turn. It also gains Trample until end of turn.
-13: Destroy all other creatures on the battle field, then you may cast a creature spell from your hand or graveyard without paying its mana cost.