Quilled Greatwurm, Crystalline Crawler, and Aggravated Assault

Prerequisites

• Quilled Greatwurm on the battlefield
• Crystalline Crawler on the battlefield
• Aggravated Assault on the battlefield
• Crystalline Crawler has power 5 or greater, does not have summoning sickness, and cannot be blocked and killed by an opponent

Steps

1. Deal combat damage using Crystalline Crawler
2. Quilled Greatwurm triggers, putting that many +1/+1 counters on Crystalline Crawler
3. Move to your postcombat main phase
4. Activate Crystalline Crawler's first ability five times by removing five +1/+1 counters from it, adding
5. Activate Aggravated Assault by paying , untapping all creatures you control and causing you to get an additional combat and main phase after this one
6. Repeat

Results

• Infinite colored mana
• Infinite combat phases
• Infinite untap of creatures you control
• Infinite mana creatures you control can produce
• Infinite combat damage
• Infinite +1/+1 counters on Crystalline Crawler