Fury Storm | Ral, Storm Conduit

Cards

Ral on the battlefield.
Fury Storm in hand.
You have cast your commander from your command zone this game.
An additional instant or sorcery in hand with the mana to cast it, or an opponent has cast an as of yet unresolved instant or sorcery spell.
({2} magic symbol) ({R} magic symbol) ({R} magic symbol) available.

Cast your additional instant or sorcery spell, or wait for an opponent to cast one.
Ral triggers, dealing 1 damage to target opponent or planeswalker.
Cast
Fury Storm targeting the instant or sorcery spell.
Ral triggers, dealing 1 damage to target opponent or planeswalker.
Fury Storm triggers, copying itself for each time you have cast your commander from your command zone this game and choosing the original copy of
Fury Storm as the target.
Ral triggers for each copy, dealing 1 damage to target opponent or planeswalker each time.
Resolve a
Fury Storm copy, copying
Fury Storm and choosing the original
Fury Storm as the target.
Ral triggers, dealing 1 damage to target opponent or planeswalker.
Repeat from step 7.