Extravagant Replication + Mnemonic Wall + Time Walk

Extravagant Replication

Mnemonic Wall

Time Walk

How it works

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 Mnemonic Wall.
4. When the Mnemonic Wall token enters the battlefield, it triggers, returning Time Walk from your graveyard to your hand.
5. Repeat.