Koll, the Forgemaster, Demonmail Hauberk, Crimson Kobolds, and Crookshank Kobolds

Prerequisites

• Koll, the Forgemaster on the battlefield
• Demonmail Hauberk on the battlefield
• Crimson Kobolds on the battlefield
• Crookshank Kobolds on the battlefield
• Demonmail Hauberk attached to Crimson Kobolds

Steps

1. Activate Demonmail Hauberk's equip ability by sacrificing Crimson Kobolds, targeting Crookshank Kobolds
2. Crimson Kobolds dies, triggering Koll, returning Crimson Kobolds from your graveyard to your hand
3. Resolve the Demonmail Hauberk ability, attaching it to Crookshank Kobolds
4. Cast Crimson Kobolds by paying
5. Activate Demonmail Hauberk's equip ability by sacrificing Crookshank Kobolds, targeting Crimson Kobolds
6. Crookshank Kobolds dies, triggering Koll, returning Crookshank Kobolds from your graveyard to your hand
7. Resolve the Demonmail Hauberk ability, attaching it to Crimson Kobolds
8. Cast Crookshank Kobolds by paying
9. Repeat

Results

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