Krark-Clan Ironworks + Spine of Ish Sah + Sculpting Steel + Ugin, the Ineffable

Krark-Clan Ironworks

Spine of Ish Sah

Sculpting Steel

Ugin, the Ineffable

How it works

1. Cast Sculpting Steel by paying 1 due to Ugin, the Ineffable. Choose to have it enter as a copy of Spine of Ish Sah.
2. When Sculpting Steel enters, its first ability triggers, destroying a permanent.
3. Activate Krark-Clan Ironworks by sacrificing Sculpting Steel, adding CC.
4. Sculpting Steel's second ability triggers, returning it from your graveyard to your hand.
5. Repeat.

This brilliant loop relies on reducing costs with Ugin, the Ineffable so that Sculpting Steel can be recast repeatedly for a single mana. Each time Sculpting Steel enters as a copy of Spine of Ish Sah, its enters-the-battlefield trigger allows you to systematically destroy any permanent on the board. When you then feed that copy to Krark-Clan Ironworks for mana, Spine of Ish Sah's graveyard trigger fires off, bouncing the Sculpting Steel right back to your hand so the entire cycle can begin anew.