Riku of Two Reflections + Narset's Reversal + Karn's Temporal Sundering

Prerequisites

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Steps

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

Effects

• Infinite turns
• Lock