Karn's Temporal Sundering + Riku of Two Reflections Combos

1 known combo featuring both cards in Commander

Infinite turns Lock

Combo 1 with Narset's Reversal

Also requires: Narset's Reversal Narset's Reversal
Results: Infinite turns · Lock
Steps
  1. Cast Karn's Temporal Sundering by paying {4}{U}{U}.
  2. Riku's first ability triggers - choose not to pay.
  3. Holding priority, cast Narset's Reversal by paying {U}{U}, targeting Karn's Temporal Sundering.
  4. Riku's first ability triggers, causing you to pay {U}{R} 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 Karn's Temporal Sundering, and returning the original Narset's Reversal to your hand.
  6. Resolve 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. Resolve Karn's Temporal Sundering, causing you to take an extra turn after this one.
  8. Repeat each turn.
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