Narset's Reversal + Fork Combo

Narset's Reversal and Fork in hand.

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

plus enough mana to cast the additional instant or sorcery available

Cast any instant or sorcery by paying its mana cost.

Holding priority, cast Fork by paying its mana cost, targeting the instant or sorcery cast in step 1.

Cast Narset's Reversal by paying , copying Fork targeting the spell cast in step 1 and returning the original Fork to your hand.

Cast Fork by paying its mana cost, copying the copy of Fork, targeting the copy of Fork.

Resolve the copy of Fork, creating a copy of Fork targeting the copy of Fork.

Repeat step 5.

Infinite magecraft triggers