Requires

Koll, the Forgemaster must be on the battlefield. Phyrexian Altar must be on the battlefield. Obsidian Battle-Axe must be on the battlefield. Goblin Fireslinger must be in hand. Your life total is greater than an opponent's. Mana needed:

Steps

1. Cast Goblin Fireslinger by paying .
2. Goblin Fireslinger enters the battlefield, triggering Obsidian Battle-Axe, attaching it to Goblin Fireslinger and giving it haste.
3. Activate Goblin Fireslinger by tapping it, dealing 1 damage to target player.
4. Activate Phyrexian Altar by sacrificing Goblin Fireslinger, adding .
5. Koll triggers, returning Goblin Fireslinger from your graveyard to your hand.
6. Repeat.

Results