Crystal Shard + Maskwood Nexus + Medomai the Ageless + Preeminent Captain

Mana needed: {3} each turn

WU identity

Commander legal

The 4 combo pieces

• Crystal Shard
• Maskwood Nexus
• Medomai the Ageless
• Preeminent Captain

What must be in place

Preeminent Captain does not have summoning sickness.
{U} or The opponent(s) being attacked can not block and kill Preeminent Captain.
The opponent(s) being attacked can not block Medomai.

How to execute it

1. Attack with Preeminent Captain, putting Medomai onto the battlefield tapped and attacking.
2. Medomai triggers on combat damage, granting you an extra turn.
3. Tap Crystal Shard, returning Medomai to your hand.
4. Repeat.

What the combo produces

• Infinite turns
• Lock