Koll, the Forgemaster, Rograkh, Son of Rohgahh, Demonmail Hauberk, and Shield Sphere

Prerequisites

• Koll, the Forgemaster on the battlefield
• Rograkh, Son of Rohgahh on the battlefield
• Demonmail Hauberk on the battlefield
• Shield Sphere on the battlefield
• Demonmail Hauberk attached to Rograkh

Steps

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

Results

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