Narset's Reversal + Reiterate

Prerequisites

You have an additional instant or sorcery card in hand with valid targets as applicable.

Steps

1. Cast any instant or sorcery by paying its mana cost.
2. Holding priority, cast Reiterate by paying its mana cost, targeting the instant or sorcery cast in step 1.
3. Cast Narset's Reversal by paying {U}{U}, copying Reiterate targeting the spell cast in step 1 and returning the original Reiterate to your hand.
4. Cast Reiterate by paying its mana cost, copying the copy of Reiterate, targeting the copy of Reiterate.
5. Resolve the copy of Reiterate, creating a copy of Reiterate targeting the copy of Reiterate.
6. Repeat step 5.