Riku of Two Reflections + Narset's Reversal + Alchemist's Gambit

Riku of Two Reflections

Narset's Reversal

Alchemist's Gambit

How it works

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

This brilliant loop turns Riku of Two Reflections into a temporal engine by harnessing the clever redirection of Narset's Reversal. When you cast Alchemist's Gambit for its cleave cost, you bypass its fatal end step clause while securing your extra turn. By responding with Narset's Reversal and utilizing Riku of Two Reflections to copy it, you seamlessly bounce both spells right back to your hand to recast indefinitely, locking down infinite turns.