Scrap Trawler + Sculpting Steel + Ashnod's Altar + Foundry Inspector
Scultping Steel in hand. All other permanents on the battlefield. A player controls a nonlegendary artifact creature with mana value four or greater. available.
- Cast Sculpting Steel by paying , choosing to have it enter the battlefield as a copy of any nonlegendary artifact creature with mana value four or greater
- Activate Ashnod's Altar by sacrificing Sculpting Steel, adding
- Sculpting Steel dies, triggering Scrap Trawler, returning Sculpting Steel from your graveyard to your hand
Infinite ETB. Infinite LTB. Infinite death triggers. Infinite sacrifice triggers. Infinite storm count.