Koll, the Forgemaster, Demonmail Hauberk, Puresteel Paladin, and Su-Chi Cave Guard

Prerequisites

• Koll, the Forgemaster on the battlefield
• Demonmail Hauberk on the battlefield
• Puresteel Paladin on the battlefield
• Su-Chi Cave Guard on the battlefield
• You control three or more artifacts, including an Equipment except Demonmail Hauberk

Steps

1. Activate an equipment except Demonmail Hauberk's equip ability by paying , attaching it to Su-Chi Cave Guard
2. Activate Demonmail Hauberk by sacrificing Su-Chi Cave Guard, targeting Koll
3. When Su-Chi Cave Guard dies, it and Koll trigger
4. Resolve the Su-Chi Cave Guard trigger, adding eight
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 Su-Chi Cave Guard by paying its mana cost
8. Repeat

Results

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