Mnemonic Wall + Cache Raiders + Time Warp

Mnemonic Wall

Cache Raiders

Time Warp

How it works

1. Cast Time Warp by paying 3, taking an extra turn after this one.
2. Cast Mnemonic Wall by paying 4.
3. Mnemonic Wall enters the battlefield, returning Time Warp from your graveyard to your hand.
4. At the beginning of your next upkeep on your extra turn, Cache Raiders triggers, returning Mnemonic Wall from the battlefield to your hand.
5. Repeat each turn.