Progenitor Mimic + Time Stretch + Pinnacle Monk // Mystic Peak

Progenitor Mimic

Time Stretch

Pinnacle Monk // Mystic Peak

How it works

1. Cast Time Stretch by paying 8, causing you to take two extra turns after this one.
2. At the beginning of your next upkeep, Progenitor Mimic triggers, creating a token copy of Pinnacle Monk.
3. When the token Pinnacle Monk enters the battlefield, it triggers, returning Time Stretch from your graveyard to your hand.
4. Move to your second extra turn.
5. Repeat.