Krark-Clan Ironworks + Myr Retriever + Scrap Trawler + Umori, the Collector

BG identity

Commander legal

The 4 combo pieces

How to execute it

  1. Activate Krark-Clan Ironworks by sacrificing Myr Retriever, adding {C}{C}.
  2. When Myr Retriever dies, it triggers, returning Scrap Trawler from your graveyard to your hand.
  3. Cast Scrap Trawler by paying its mana cost, which is reduced by Umori.
  4. Activate Krark-Clan Ironworks by sacrificing Scrap Trawler, adding {C}{C}.
  5. When Scrap Trawler dies, it triggers, returning Myr Retriever from your graveyard to your hand.
  6. Cast Myr Retriever by paying its mana cost, which is reduced by Umori.
  7. Repeat.

What the combo produces