Koll, the Forgemaster, Puresteel Paladin, Mortarpod, and Ornithopter

Prerequisites

• Koll, the Forgemaster on the battlefield
• Puresteel Paladin on the battlefield
• Mortarpod on the battlefield
• Ornithopter on the battlefield
• Mortarpod attached to Ornithopter
• You control at least three artifacts

Steps

1. Activate Ornithopter by sacrificing it
2. Ornithopter dies, triggering Koll, returning Ornithopter from your graveyard to your hand
3. Resolve the Ornithopter ability, dealing 1 damage to any target
4. Cast Ornithopter by paying
5. Activate Mortarpod's equip ability by paying , attaching it to Ornithopter
6. Repeat

Results

• Infinite damage
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite storm count