Vigor + Hanabi Blast + Crystalline Crawler + Bösium Strip + Angrath's Marauders

Vigor

Hanabi Blast

Crystalline Crawler

Bösium Strip

Angrath's Marauders

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 loop relies on Vigor's fantastic replacement effect to turn Hanabi Blast's damage into massive growth instead of destruction, preventing the damage dealt to Crystalline Crawler and converting it directly into four +1/+1 counters. You can then strip those counters away using Crystalline Crawler's mana ability to continuously fund casting Hanabi Blast, with Angrath's Marauders doubling the initial damage source to ensure the math generates a net surplus of mana. Finally, Bösium Strip acts as your graveyard-casting engine to tie the loop together and let you recast the spell repeatedly, letting you pivot the doubled damage from Hanabi Blast toward your opponents once your infinite colored mana is secured.