Infinite colored mana, Infinite combat phases, Infinite +1/+1 counters on creatures you control
At the beginning of your combat phase, Maester Seymour triggers, putting at least five +1/+1 counters on Crystalline Crawler.
Activate Crystalline Crawler's first ability five times by removing five +1/+1 counters from it, adding .
Activate Najeela by paying , untapping all attacking creatures you control and causing you to get an additional combat phase after this one.
Repeat.
Component Cards
How It Works
At the beginning of your combat phase, Maester Seymour triggers, putting at least five +1/+1 counters on Crystalline Crawler.
Activate Crystalline Crawler's first ability five times by removing five +1/+1 counters from it, adding .
Activate Najeela by paying , untapping all attacking creatures you control and causing you to get an additional combat phase after this one.
Repeat.