Koll, the Forgemaster, Demonmail Hauberk, Memnite, and Shield Sphere

Prerequisites

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

Steps

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

Results

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