Garko, Goblin Master

+1: Garko, Goblin Master becomes a 6/6 goblin creature with flying, haste and indestructible that's still a planeswalker until end of turn.
-3: Do 3 damage to target creature. If the creature is destroyed, put down a 1/1 red goblin warrior creature token with haste onto the battlefield.
-8: Put down X red goblin creature tokens where X is the number of humans and elves in all graveyards. Garko, Goblin Master can be your commander