Thassa, Deep-Dwelling, Eternal Witness, and Walk the Aeons

Prerequisites

• Thassa, Deep-Dwelling on the battlefield
• Eternal Witness on the battlefield
• Walk the Aeons in hand
• each turn available

Steps

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

Results

• Infinite turns