Crystalline Crawler + Dancing from Dark to Dawn + Sparkcaster

Crystalline Crawler

Dancing from Dark to Dawn

Sparkcaster

How it works

1. Cast Sparkcaster by paying its mana cost.
2. Dancing from Dark to Dawn's first ability triggers, putting four +1/+1 counters on Crystalline Crawler.
3. Resolve the Sparkcaster spell. When it enters, its first and second abilities trigger.
4. Resolve the first trigger, returning Sparkcaster from the battlefield to your hand.
5. Resolve the second trigger, dealing 1 damage to an opponent.
6. Activate Crystalline Crawler four times by removing four +1/+1 counters from it, adding 2.
7. Repeat.