Goblin Bombardment + Furystoke Giant + Thran Vigil

Goblin Bombardment

Furystoke Giant

Thran Vigil

How it works

1. Activate Goblin Bombardment by sacrificing Furystoke Giant.
2. When Furystoke Giant dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
3. Thran Vigil triggers, putting a +1/+1 counter on Furystoke Giant.
4. Resolve the Goblin Bombardment ability.
5. Repeat.