Vigor + Hanabi Blast + Crystalline Crawler + Bösium Strip + Primal Vigor

Vigor

Hanabi Blast

Crystalline Crawler

Bösium Strip

Primal Vigor

How it works

1. Activate Bösium Strip by paying 3 and tapping it, allowing you to cast instants and sorceries from the top of your graveyard this turn.
2. Cast Hanabi Blast either from your hand or from the top of your graveyard by paying 1, targeting Crystalline Crawler.
3. 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.
4. Activate Crystalline Crawler's first ability three times by removing three +1/+1 counters from it, adding 1.
5. Repeat from step 2.
6. Once you have infinite colored mana, you may instead target any other creature and/or player with Hanabi Blast.

This clever loop turns damage into an engine by using Vigor to intercept the 2 damage dealt by Hanabi Blast to Crystalline Crawler, turning it into double the +1/+1 counters via Primal Vigor's replacement effect. Those accumulated counters are then peeled right back off Crystalline Crawler for mana to recast Hanabi Blast—which can be conveniently pulled from the graveyard thanks to Bösium Strip's active permission if it gets discarded to random chance.