Infinite colored mana, Infinite combat phases, Infinite untap of creatures you control, Infinite mana creatures you control can produce, Infinite +1/+1 counters on creatures you control
At the beginning of your combat phase, Ouroboroid triggers, putting at least five +1/+1 counters on each creature you control.
Move to your postcombat main phase.
Activate Crystalline Crawler's first ability five times by removing five +1/+1 counters from it, adding .
Activate Aggravated Assault by paying , untapping all creatures you control and causing you to get an additional combat and main phase after this one.
Repeat.
Component Cards
How It Works
At the beginning of your combat phase, Ouroboroid triggers, putting at least five +1/+1 counters on each creature you control.
Move to your postcombat main phase.
Activate Crystalline Crawler's first ability five times by removing five +1/+1 counters from it, adding .
Activate Aggravated Assault by paying , untapping all creatures you control and causing you to get an additional combat and main phase after this one.
Repeat.