Progenitor Mimic + Returned Pastcaller + Time Stretch

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

RGWU identity

Commander legal

The 3 combo pieces

• Progenitor Mimic
• Returned Pastcaller
• Time Stretch

What must be in place

Progenitor Mimic is a copy of Returned Pastcaller.

How to execute it

1. Cast Time Stretch by paying {8}{U}{U}, taking two extra turns after this one.
2. At the beginning of your next upkeep, Progenitor Mimic triggers, creating a token copy of Returned Pastcaller.
3. When the token Returned Pastcaller enters the battlefield, it triggers itself, returning Time Stretch from your graveyard to your hand.
4. Repeat.

What the combo produces

• Infinite turns
• Lock