Ashnod's Altar + Mirrodin Besieged + Myr Retriever + Scrap Trawler

U identity

Commander legal

The 4 combo pieces

What must be in place

"Mirran" chosen with Mirrodin Besieged.

How to execute it

  1. Activate Ashnod's Altar by sacrificing Scrap Trawler, adding {C}{C}.
  2. When Scrap Trawler dies, it triggers, returning Myr Retriever from your graveyard to your hand.
  3. Cast Myr Retriever by paying {2}.
  4. Mirrodin Besieged triggers, creating a 1/1 Myr artifact creature token.
  5. Activate Ashnod's Altar twice by sacrificing the Myr and Myr Retriever, adding {C}{C}{C}{C}.
  6. When Myr Retriever dies, it triggers, returning Scrap Trawler from your graveyard to your hand.
  7. Cast Scrap Trawler by paying {3}.
  8. Mirrodin Besieged triggers, creating a 1/1 Myr artifact creature token.
  9. Repeat.

What the combo produces