Aggravated Assault + Crystalline Crawler + Maester Seymour

RG identity

Commander legal

The 3 combo pieces

• Aggravated Assault
• Crystalline Crawler
• Maester Seymour

How to execute it

1. At the beginning of your combat phase, Maester Seymour triggers, putting at least five +1/+1 counters on Crystalline Crawler.
2. Move to your postcombat main phase.
3. Activate Crystalline Crawler's first ability five times by removing five +1/+1 counters from it, adding {3}{R}{R}.
4. 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.
5. Repeat.

What the combo produces

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