How can you create a combo with Twinning Staff, Narset's Reversal?
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[START OF COMBO]This combo can be formed with Twinning Staff, Narset's Reversal

Color identity: U
Mana cost: {7}{U}{U}
Steps:
  1. Cast the instant or sorcery spell.
  2. Holding priority, cast Narset's Reversal by paying {U}{U}, targeting the instant or sorcery spell.
  3. Holding priority, activate twinning staff by paying {7} targeting Narset's Reversal, copying Narset's Reversal twice.
  4. Resolve one copy of Narset's Reversal targeting another copy of Narset's Reversal, copying it twice and returning the targeted copy to your hand.
  5. Repeat step 4.[END OF COMBO STEPS]

Result:
  - Infinite magecraft triggers[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Twinning Staff must be on the battlefield
  - Narset's Reversal must be in your hand
  - an instant or sorcery spell in hand.
  - Mana available to cast the instant or sorcery spell.
[END OF COMBO PREREQUISITES]
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