Artificial Evolution + Crystal Shard + Medomai the Ageless + Preeminent Captain

Mana needed: {U}{U}

WU identity

Commander legal

The 4 combo pieces

What must be in place

Medomai and Preeminent Captain does not have summoning sickness.
Opponents can not block and kill Preeminent Captain and Medomai.

How to execute it

  1. Cast Artificial Evolution by paying {U}, changing all instances of "Soldier" on Preeminent Captain to "Sphinx".
  2. Declare Preeminent Captain as an attacker.
  3. Preeminent Captain triggers, putting Medomai from your hand onto the battlefield tapped and attacking.
  4. Deal combat damage with Medomai, causing you to take an extra turn after this one.
  5. Activate Crystal Shard by paying {U} and tapping it, returning Medomai to your hand.
  6. Pass the turn.
  7. Repeat from step 2.

What the combo produces