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

Prerequisites

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

Steps

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

Results

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