Extravagant Replication, Vampire Charmseeker, and Time Walk

Prerequisites

• Extravagant Replication on the battlefield
• Vampire Charmseeker on the battlefield
• Time Walk in hand
• You have enough mana to cast Time Walk each turn

Steps

1. Cast Time Walk by paying its mana cost, causing you to take an extra turn after this one
2. Move to your next turn
3. At the beginning of your upkeep, Extravagant Replication triggers, creating a token copy of Vampire Charmseeker
4. When the Vampire Charmseeker token enters the battlefield, it triggers, returning Time Walk from your graveyard to your hand
5. Repeat

Results

• Infinite turns