Koll, the Forgemaster + Ronin Warclub + Memnite + Goblin Bombardment

Koll, the Forgemaster

Ronin Warclub

Memnite

Goblin Bombardment

How it works

1. Cast Memnite by paying 0.
2. When Memnite enters the battlefield, Ronin Warclub triggers, attaching Ronin Warclub to Memnite.
3. Activate Goblin Bombardment by sacrificing Memnite.
4. When Memnite dies, Koll triggers, returning Memnite from your graveyard to your hand.
5. Resolve the Goblin Bombardment ability, dealing 1 damage to any target.
6. Repeat.

This clever loop relies on Memnite and its free casting cost to set the machinery in motion, letting you churn out infinite damage. As Memnite enters the battlefield, Ronin Warclub automatically equips itself to the creature, ensuring it is properly equipped for what follows. You then sacrifice the newly equipped automaton to Goblin Bombardment to deal 1 damage to any target. Because the creature was equipped when it died, Koll, the Forgemaster's static ability triggers and returns Memnite straight back to your hand, ready to be cast for zero mana once again.