Koll, the Forgemaster + Demonmail Hauberk + Lightning Greaves + Su-Chi Cave Guard

Koll, the Forgemaster

Demonmail Hauberk

Lightning Greaves

Su-Chi Cave Guard

How it works

1. Activate Lightning Greaves's equip ability by paying 0, 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 C.
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.