Vigor + Hanabi Blast + Crystalline Crawler + Bösium Strip + Dictate of the Twin Gods

Vigor

Hanabi Blast

Crystalline Crawler

Bösium Strip

Dictate of the Twin Gods

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 eccentric loop centers around Hanabi Blast targeting Crystalline Crawler, whose counters are continually replenished because Vigor replaces the damage dealt to it with a wealth of +1/+1 counters instead. To make this self-sustaining, Dictate of the Twin Gods doubles that incoming damage so a single Hanabi Blast explosion yields four counters—more than enough for Crystalline Crawler to convert back into the red mana needed to keep casting. Meanwhile, Bösium Strip ensures you always have a way to pull the spell back into the mix if it ever finds its way to the graveyard, keeping this magnificent, chaotic engine firing indefinitely.