Mnemonic Wall + Cache Raiders + Temporal Manipulation

Mnemonic Wall

Cache Raiders

Temporal Manipulation

How it works

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