Ashnod's Altar + Myr Retriever + Scrap Trawler + Urza, Lord Protector

WU identity

Commander legal

The 4 combo pieces

How to execute it

  1. Activate Ashnod's Altar 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 Urza.
  4. Activate Ashnod's Altar 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 Urza.
  7. Repeat.

What the combo produces