Koll, the Forgemaster + Rograkh, Son of Rohgahh + Demonmail Hauberk + Shield Sphere

Koll, the Forgemaster

Rograkh, Son of Rohgahh

Demonmail Hauberk

Shield Sphere

How it works

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

This ingenious loop relies on a clever gear-shifting act where Demonmail Hauberk serves as both the engine and the cost, letting you repeatedly sacrifice your own creatures to equip it. Because Rograkh, Son of Rohgahh and Shield Sphere both cost zero mana to cast, you can alternate feeding them to the Hauberk without ever running out of resources. Meanwhile, Koll, the Forgemaster keeps the cycle spinning infinitely by catching whichever zero-mana artifact creature just perished and bouncing it right back to your hand, capitalized by the fact that the Hauberk's equip cost simultaneously makes the target creature "equipped" for Koll's return trigger.