How can you create a combo with Riku of Two Reflections, Narset's Reversal, Notorious Throng?
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[START OF COMBO]This combo can be formed with Riku of Two Reflections, Narset's Reversal, Notorious Throng

Color identity: GUR
Mana cost: {5}{U}{U}{U}{U}{R} each turn
Steps:
  1. Deal combat damage to an opponent using a Rogue.
  2. Cast Notorious Throng for its prowl cost by paying {5}{U}
  3. Riku's first ability triggers - choose not to pay.
  4. Holding priority, cast Narset's Reversal by paying {U}{U}, targeting Notorious Throng.
  5. 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.
  6. Resolve the copy of Narset's Reversal, copying the original Narset's Reversal targeting Notorious Throng, and returning the original Narset's Reversal to your hand.
  7. Resolve the copy of Narset's Reversal created in step 5, copying Notorious Throng and returning the original Notorious Throng to your hand.
  8. Resolve Notorious Throng, causing you to take an extra turn after this one and create a number of 1/1 Faerie Rogue creature tokens.
  9. Repeat each turn.[END OF COMBO STEPS]

Result:
  - Infinite turns[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Riku of Two Reflections must be on the battlefield
  - Narset's Reversal must be in your hand
  - Notorious Throng must be in your hand
  - You control at least one Rogue that does not have summoning sickness and cannot be blocked by an opponent.
[END OF COMBO PREREQUISITES]
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