Koll, the Forgemaster + Demonmail Hauberk + Kobolds of Kher Keep + Phyrexian Walker

Koll, the Forgemaster

Demonmail Hauberk

Kobolds of Kher Keep

Phyrexian Walker

How it works

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

This clever loop turns zero-mana creatures into an endless sacrifice engine by utilizing Demonmail Hauberk's alternate equip cost as a free way to bin your own board. With Koll, the Forgemaster watching the action from the command zone, whenever your equipped creatures hit the graveyard, his static return ability scoops them right back to your hand instead of letting them stay dead. By continuously cycling back and forth between your free-to-cast Kobolds of Kher Keep and Phyrexian Walker, you can pass the heavy armor between them indefinitely to generate an unstoppable storm count and endless sacrifice triggers.