God of the Ancient

+3: Create two 1/1 colorless Eldrazi Scion creature tokens with "Sacrifice this creature: Add 1 to your mana pool."
0: God of the Ancient becomes an 8/8 colorless Eldrazi creature with indestructible until end of turn that's still a planeswalker.
-20: Lands you control become 5/5 colorless elemental creatures with hexproof and trample. They're still lands.