Koll, the Forgemaster + Dissection Tools + Umbral Mantle + Su-Chi Cave Guard

Koll, the Forgemaster

Dissection Tools

Umbral Mantle

Su-Chi Cave Guard

How it works

1. Activate Umbral Mantle's equip ability by paying 0, attaching it to Su-Chi Cave Guard.
2. Activate Dissection Tools 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 Dissection Tools ability, attaching it to Koll.
7. Cast Su-Chi Cave Guard by paying its mana cost.
8. Repeat.