Scrap Trawler + Sculpting Steel + Krark-Clan Ironworks + Foundry Inspector

Scrap Trawler
Sculpting Steel
Krark-Clan Ironworks
Foundry Inspector

Requires
Scultping Steel in hand. All other permanents on the battlefield. 2 available.
Steps
  1. Cast Sculpting Steel by paying 2, choosing to have it enter the battlefield as a copy of Krark-Clan Ironworks
  2. Activate Krark-Clan Ironworks by sacrificing Sculpting Steel, adding cc
  3. Sculpting Steel dies, triggering Scrap Trawler, returning Sculpting Steel from your graveyard to your hand
  4. Repeat
Results
Infinite ETB. Infinite LTB. Infinite death triggers. Infinite sacrifice triggers. Infinite storm count.