Thassa, Deep-Dwelling + Mnemonic Wall + Walk the Aeons

Thassa, Deep-Dwelling

Mnemonic Wall

Walk the Aeons

How it works

1. Cast Walk the Aeons by paying 4, getting an extra turn after this one.
2. At the beginning of your end step, Thassa triggers, blinking Mnemonic Wall.
3. Mnemonic Wall enters the battlefield, returning Walk the Aeons from your graveyard to your hand.
4. Repeat.