Progenitor Mimic + Time Stretch + Timeless Witness

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

GU identity

Commander legal

The 3 combo pieces

• Progenitor Mimic
• Time Stretch
• Timeless Witness

How to execute it

1. Cast Time Stretch by paying its mana cost, taking an extra turn after this one.
2. At the beginning of your next upkeep, Progenitor Mimic triggers, creating a token copy of Timeless Witness.
3. When the token Timeless Witness enters the battlefield, it triggers itself, returning Time Stretch from your graveyard to your hand.
4. Repeat during your second extra turn.

What the combo produces

• Infinite turns
• Lock