Koll, the Forgemaster, Demonmail Hauberk, Lightning Greaves, and Su-Chi

Prerequisites

• Koll, the Forgemaster on the battlefield
• Demonmail Hauberk on the battlefield
• Lightning Greaves on the battlefield
• Su-Chi on the battlefield

Steps

1. Activate Lightning Greaves's equip ability by paying , attaching it to Su-Chi
2. Activate Demonmail Hauberk by sacrificing Su-Chi, targeting Koll
3. When Su-Chi dies, it and Koll trigger
4. Resolve the Su-Chi 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 Su-Chi by paying its mana cost
8. Repeat

Results

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