Resolve Hanabi Blast, putting four +1/+1 counters on Crystalline Crawler due to Vigor's first ability, and then returning Hanabi Blast to your hand and discarding a card at random.
Conspiracy Theorist's second ability triggers, allowing you to exile the discarded card from your graveyard if it was a nonland card and cast it from exile this turn.
Activate Crystalline Crawler's first ability three times by removing three +1/+1 counters from it, adding ({1} magic symbol) ({R} magic symbol) ({R} magic symbol) .
Cast Hanabi Blast either from your hand or from exile by paying ({1} magic symbol) ({R} magic symbol) ({R} magic symbol) .
Repeat from step 2.
Once you have infinite colored mana, you may instead target any other creature and/or player with Hanabi Blast.