Koll, the Forgemaster + Demonmail Hauberk + Phyrexian Walker + Shield Sphere

Koll, the Forgemaster

Demonmail Hauberk

Phyrexian Walker

Shield Sphere

How it works

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

This clever loop turns the zero-cost castings of Phyrexian Walker and Shield Sphere into an infinite engine by leveraging Demonmail Hauberk’s alternative equip cost as a free sacrifice outlet. Whenever one of these free artifacts hits the graveyard, Koll, the Forgemaster steps in with his triggered ability to bounce it right back to your hand, bypassing the need for traditional card draw. Because both creatures cost nothing to cast, you can endlessly alternate sacrificing them to equip the Hauberk, generating infinite sacrifices, enters-the-battlefield triggers, and a massive storm count.