Progenitor Mimic, Time Stretch, and Scholar of the Ages

Prerequisites

• Progenitor Mimic on the battlefield
• Time Stretch on the battlefield
• Scholar of the Ages on the battlefield
• Enough mana available to cast the extra turn spell each turn
• Progenitor Mimic is a copy of Scholar of the Ages

Steps

1. Cast Time Stretch by paying its mana cost, taking two extra turns after this one
2. At the beginning of your next upkeep, Progenitor Mimic triggers, creating a token copy of Scholar of the Ages
3. When the token Scholar of the Ages enters the battlefield, it triggers itself, returning Time Stretch and up to one other instant or sorcery card from your graveyard to your hand
4. Repeat

Results

• Infinite turns