Koll, the Forgemaster + Demonmail Hauberk + Crimson Kobolds + Shield Sphere

Koll, the Forgemaster

Demonmail Hauberk

Crimson Kobolds

Shield Sphere

How it works

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