Koll, the Forgemaster + Demonmail Hauberk + Crimson Kobolds + Ornithopter

Koll, the Forgemaster

Demonmail Hauberk

Crimson Kobolds

Ornithopter

How it works

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