Verren, The Forsaken Soul

+1: Summon a 1/1 Yokai token with vigilance on the battlefield. When these tokens died, they go to the graveyard.
+2: Summon 2 1/1 Yokai token with vigilance in the graveyard.
-10: Deal X damage to each opponents, where X is the number of lands and creatures in your graveyard.