Narset's Reversal | Return the Favor

Cards

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

({1} magic symbol) ({U} magic symbol) ({U} magic symbol) ({R} magic symbol) ({R} magic symbol) plus enough mana to cast the additional instant or sorcery available.

Cast any instant or sorcery by paying its mana cost.
Holding priority, cast
Return the Favor by paying ({R} magic symbol) ({R} magic symbol) plus an additional ({1} magic symbol) to choose its first mode, targeting the instant or sorcery cast in step 1.
Cast
Narset's Reversal by paying ({U} magic symbol) ({U} magic symbol) , copying
Return the Favor targeting the spell cast in step 1 and returning the original
Return the Favor to your hand.
Cast
Return the Favor by paying its mana cost, copying the copy of
Return the Favor, targeting the copy of
Return the Favor.
Resolve the copy of
Return the Favor, creating a copy of
Return the Favor targeting the copy of
Return the Favor.
Repeat step 5.

This combo has been estimated to be Exhibition (Bracket 1+).