Vigor + Hanabi Blast + Crystalline Crawler + Oskar, Rubbish Reclaimer + Furnace of Rath

Vigor

Hanabi Blast

Crystalline Crawler

Oskar, Rubbish Reclaimer

Furnace of Rath

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 loop turns a damage-dealing spell into an explosive engine by leveraging Vigor and Furnace of Rath to convert Hanabi Blast's damage into massive growth on Crystalline Crawler. As the Crawler absorbs this doubled damage, its counters scale rapidly, providing the fuel you need to activate its mana-producing ability. Meanwhile, Oskar, Rubbish Reclaimer allows you to effortlessly recycle Hanabi Blast each time it forces a random discard, keeping the loop self-sustaining and chaining your resources into infinite damage and mana.