Koll, the Forgemaster + Demonmail Hauberk + Crookshank Kobolds + Memnite

Koll, the Forgemaster

Demonmail Hauberk

Crookshank Kobolds

Memnite

How it works

1. Activate Demonmail Hauberk's equip ability by sacrificing Crookshank Kobolds, targeting Memnite.
2. When Crookshank Kobolds dies, Koll triggers, returning Crookshank Kobolds from your graveyard to your hand.
3. Resolve the Demonmail Hauberk ability, attaching it to Memnite.
4. Cast Crookshank Kobolds by paying 0.
5. Activate Demonmail Hauberk's equip ability by sacrificing Memnite, targeting Crookshank Kobolds.
6. When Memnite dies, Koll triggers, returning Memnite from your graveyard to your hand.
7. Resolve the Demonmail Hauberk ability, attaching it to Crookshank Kobolds.
8. Cast Memnite by paying 0.
9. Repeat.

This loop turns the zero-cost metal creatures into a perpetual sacrifice engine by using Demonmail Hauberk's alternative equip cost to feed itself. As long as you keep passing the heavy armor back and forth between Memnite and Crookshank Kobolds, Koll, the Forgemaster steps in to catch the dying creature and bounce it straight back to your hand. Because both zero-mana targets are naturally enchanted or equipped the moment they enter, Koll's resurrection trigger fires reliably every single time a sacrifice occurs. It's a brilliantly brutal recycling system that lets you recast your tiny artifact creatures for free ad infinitum.