Koll, the Forgemaster, Demonmail Hauberk, Grafted Wargear, and Cathodion

Prerequisites

• Koll, the Forgemaster on the battlefield
• Demonmail Hauberk on the battlefield
• Grafted Wargear on the battlefield
• Cathodion on the battlefield

Steps

1. Activate Grafted Wargear's equip ability by paying , attaching it to Cathodion
2. Activate Demonmail Hauberk by sacrificing Cathodion, targeting Koll
3. When Cathodion dies, it and Koll trigger
4. Resolve the Cathodion trigger, adding
5. Resolve the Koll trigger, returning it from your graveyard to your hand
6. Resolve the Demonmail Hauberk ability, attaching it to Koll
7. Cast Cathodion by paying its mana cost
8. Repeat

Results

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