Zacama, Primal Calamity + Crystalline Crawler + Light of Promise

Zacama, Primal Calamity

Crystalline Crawler

Light of Promise

How it works

1. Activate Zacama's third ability by paying 2, causing you to gain three life.
2. Light of Promise triggers, putting three +1/+1 counters on Crystalline Crawler.
3. Activate Crystalline Crawler's first ability three times by removing three +1/+1 counters from it, adding 2.
4. Repeat.