Aggravated Assault + Crystalline Crawler + Quilled Greatwurm

RG identity

Commander legal

The 3 combo pieces

• Aggravated Assault
• Crystalline Crawler
• Quilled Greatwurm

What must be in place

Crystalline Crawler has power 5 or greater, does not have summoning sickness, and cannot be blocked and killed by an opponent.

How to execute it

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 {3}{R}{R}.
5. Activate Aggravated Assault by paying {3}{R}{R}, untapping all creatures you control and causing you to get an additional combat and main phase after this one.
6. Repeat.

What the combo produces

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