Grimlore, Endless Death

+3: Enchant 4 target lands, they gain a Hellburn counter on it, it has "At your upkeep, you lose 2 life and controller of Grimlore gains 2 life."
-4: Destroy target 3 non-land permanents. Create two 6/6 black Dragon Demon with flying, indestructible, and trample. You lose 5 life.
-17: Search your library for any number of Dragon or Demon creatures, put them on the battlefield. Every creature you control has hexproof.