Alania, Divergent Storm | Reverberate

Cards

Reverberate in hand.
Alania on the battlefield.
You have not cast an instant or sorcery spell this turn.
You have a sorcery card in hand.
({R} magic symbol) ({R} magic symbol) plus enough mana to cast the additional sorcery available.

Cast the additional sorcery by paying its mana cost.
Alania triggers; choose not to have an opponent draw a card.
Holding priority, cast
Reverberate by paying ({R} magic symbol) ({R} magic symbol) , targeting the additional sorcery.
Alania triggers, causing an opponent to draw a card and you to copy
Reverberate, with the copy targeting the original
Reverberate.
Resolve the copy of
Reverberate, copying the original
Reverberate, with the copy targeting the original
Reverberate.
Repeat step 5.