Koll, the Forgemaster + Demonmail Hauberk + Rograkh, Son of Rohgahh + Ornithopter

Koll, the Forgemaster

Demonmail Hauberk

Rograkh, Son of Rohgahh

Ornithopter

How it works

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

This elegant loop relies on free-to-cast creatures to continually fuel Demonmail Hauberk's alternate equip cost, which requires sacrificing a creature. By sacrificing either Rograkh, Son of Rohgahh or Ornithopter to the Hauberk, that dying creature triggers Koll, the Forgemaster's static ability to immediately return it right back to your hand. Because both zero-mana artifacts and commanders like Rograkh can be re-cast for free, you can endlessly bounce and replay them while cycling the heavy equipment back and forth between the two.