Goblin Bombardment + Thran Vigil + Glen Elendra Archmage

Goblin Bombardment

Thran Vigil

Glen Elendra Archmage

How it works

1. Activate Goblin Bombardment by sacrificing Glen Elendra Archmage.
2. When Glen Elendra Archmage 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 Glen Elendra Archmage.
4. Resolve the Goblin Bombardment ability.
5. Repeat.

This loop is a masterclass in turning persist's built-in limitation into an infinite engine, fueled entirely by Glen Elendra Archmage and Goblin Bombardment working in tandem. When you sacrifice the Archmage to the Bombardment, it triggers persist to bring itself back with a -1/-1 counter, but Thran Vigil swoops in as it leaves the graveyard to place a +1/+1 counter on it instead. State-based actions then cause the +1/+1 and -1/+1 counters to annihilate each other, leaving the Archmage entirely clean and ready to repeat the process indefinitely for infinite damage and death triggers.