Vigor + Hanabi Blast + Crystalline Crawler + Conspiracy Theorist + Primal Vigor

Vigor

Hanabi Blast

Crystalline Crawler

Conspiracy Theorist

Primal Vigor

How it works

1. Cast Hanabi Blast by paying 1, targeting Crystalline Crawler.
2. 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.
3. 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.
4. Activate Crystalline Crawler's first ability three times by removing three +1/+1 counters from it, adding 1.
5. Cast Hanabi Blast either from your hand or from exile by paying 1.
6. Repeat from step 2.
7. Once you have infinite colored mana, you may instead target any other creature and/or player with Hanabi Blast.

This clever engine turns the self-inflicted damage of Hanabi Blast into a fountain of growth and mana. When Hanabi Blast targets Crystalline Crawler, Vigor steps in to prevent that damage and instead reward the creature with +1/+1 counters, a doubling effect further amplified by Primal Vigor's replacement ability. You can then strip those accumulated counters using Crystalline Crawler's ability to generate the exact mana needed to recast the spell. Meanwhile, whenever the random discard from Hanabi Blast hits the graveyard, Conspiracy Theorist allows you to exile and cast it right back out of exile, keeping the loop completely self-sustaining.