Vigor + Hanabi Blast + Crystalline Crawler + Oskar, Rubbish Reclaimer + Vorinclex, Monstrous Raider

Vigor

Hanabi Blast

Crystalline Crawler

Oskar, Rubbish Reclaimer

Vorinclex, Monstrous Raider

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. Oskar triggers if the discarded card was a nonland card.
4. Holding priority, activate Crystalline Crawler;s first ability three times by removing three +1/+1 counters from it, adding 1.
5. Resolve the Oskar trigger, choosing to cast Hanabi Blast if it was the discarded card by paying 1 targeting Crystalline Crawler, or choosing not to cast the card otherwise.
6. If you did not cast Hanabi Blast using Oskar, cast it from your hand by paying 1, targeting Crystalline Crawler.
7. Repeat from step 2.
8. Once you have infinite colored mana, you may instead target any other creature and/or player with Hanabi Blast.

This explosive loop turns the self-inflicted damage of Hanabi Blast into an engine by pointing it directly at Crystalline Crawler. Instead of taking damage, Vigor steps in to prevent it, turning each point of damage into a +1/+1 counter on Crystalline Crawler, a process dramatically supercharged by Vorinclex, Monstrous Raider doubling the counters placed. You can then strip those counters off Crystalline Crawler for mana to fund your spells, while Oskar, Rubbish Reclaimer lets you continuously recast Hanabi Blast from your graveyard each time you discard it to its own effect.