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 seven +1/+1 counters on Crystalline Crawler.
Declare Hellkite Charger as an attacker, triggering its ability.
Holding priority, activate Crystalline Crawler's first ability seven times by removing seven +1/+1 counters from it, adding .
Resolve the Hellkite Charger trigger, causing you to pay to untap all attacking creatures you control and 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 seven +1/+1 counters on Crystalline Crawler.
Declare Hellkite Charger as an attacker, triggering its ability.
Holding priority, activate Crystalline Crawler's first ability seven times by removing seven +1/+1 counters from it, adding .
Resolve the Hellkite Charger trigger, causing you to pay to untap all attacking creatures you control and to get an additional combat phase after this one.
Repeat.