Mystic Retrieval, Runic Repetition, and Time Warp

Prerequisites

• Mystic Retrieval in hand
• Runic Repetition in the graveyard
• Time Warp on the battlefield
• each turn available

Steps

1. Cast Time Warp by paying , causing you to take an extra turn after this one
2. Cast Mystic Retrieval by paying , returning Runic Repetition to your hand from your graveyard
3. Cast Mystic Retrieval from your graveyard for its flashback cost by paying , returning Time Warp from your graveyard to your hand and exiling Mystic Retrieval
4. Cast Runic Repetition by paying , returning Mystic Retrieval from exile to your hand
5. Repeat each turn

Results

• Infinite turns
• Instant/Sorcery with "Return Instant/Sorcery from GY to hand"