Atlas, WorldBender

+3: Create three 5/5 wall elemental creature tokens with Defender, Then two 3/3 golem creature tokens, Then one 7/7 Stone Creature Token
-4: Creatures you control get +X/+X where X is the number of Green Mana symbols among permenents you control
-15: Create five 5/5 Stone creature tokens,Then creatures you control get +10/+10 ,Trample, Haste, and Indestructible until the end of turn