Koll, the Forgemaster, Demonmail Hauberk, Crimson Kobolds, and Shield Sphere

Prerequisites

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

Steps

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

Results

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