Riku of Two Reflections + Narset's Reversal + Part the Waterveil

Riku of Two Reflections

Narset's Reversal

Part the Waterveil

How it works

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

This spell-loop hinges on Riku of Two Reflections sitting safely on your board, turning every casting of Narset's Reversal into a self-sustaining engine. By using Riku of Two Reflections to copy Narset's Reversal while it targets Part the Waterveil, you continuously bounce both spells right back to your hand for reuse. This lets you resolve Part the Waterveil over and over again, locking in infinite extra turns to completely bury your opponents under endless phases.