Riku of Two Reflections, Narset's Reversal, and Walk the Aeons

Prerequisites

• Riku of Two Reflections on the battlefield
• Narset's Reversal in hand
• Walk the Aeons in hand
• each turn available

Steps

1. Cast Walk the Aeons by paying
2. Riku's first ability triggers - choose not to pay
3. Holding priority, cast Narset's Reversal by paying , targeting Walk the Aeons
4. Riku's first ability triggers, causing you to pay to copy Narset's Reversal, with the copy targeting the original Narset's Reversal
5. Resolve the copy of Narset's Reversal, copying the original Narset's Reversal targeting Walk the Aeons, and returning the original Narset's Reversal to your hand
6. Resolve the copy of Narset's Reversal created in step 5, copying Walk the Aeons and returning the original Walk the Aeons to your hand
7. Resolve Walk the Aeons, causing you to take an extra turn after this one
8. Repeat each turn

Results

• Infinite turns