Archelos, Lagoon Mystic + Biomancer's Familiar + Gretchen Titchwillow + Simic Growth Chamber

BGU identity

Commander legal

The 4 combo pieces

What must be in place

Archelos is untapped.

How to execute it

  1. Play Simic Growth Chamber.
  2. Simic Growth Chamber enters the battlefield untapped due to Archelos, triggering itself.
  3. Holding priority, activate Simic Growth Chamber by tapping it, adding {G}{U}.
  4. Resolve the Simic Growth Chamber trigger from step 2, returning itself to your hand from the battlefield.
  5. Activate Gretchen Titchwillow by paying {G}{U}, causing you to draw a card and put Simic Growth Chamber from your hand onto the battlefield.
  6. Repeat from step 2.

What the combo produces