Eternal Witness + Thassa, Deep-Dwelling + Time Stretch

Mana needed: {8}{U}{U} every other turn

GU identity

Commander legal

The 3 combo pieces

• Eternal Witness
• Thassa, Deep-Dwelling
• Time Stretch

How to execute it

1. Cast Time Stretch by paying {8}{U}{U}, getting two extra turns after this one.
2. At the beginning of your end step, Thassa triggers, blinking Eternal Witness.
3. Eternal Witness enters the battlefield, returning Time Stretch from your graveyard to your hand.
4. Repeat every other turn.

What the combo produces

• Infinite turns
• Lock