Mnemonic Wall + Crystal Shard + Time Warp

Mnemonic Wall

Crystal Shard

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. Activate Crystal Shard by paying and tapping it, returning Mnemonic Wall from the battlefield to your hand.
5. Repeat each turn.