Byrke, Long Ear of the Law, Crystalline Crawler, and Aggravated Assault

Prerequisites

• Byrke, Long Ear of the Law on the battlefield
• Crystalline Crawler on the battlefield
• Aggravated Assault on the battlefield
• Crystalline Crawler has at least five +1/+1 counters on it
• Crystalline Crawler does not have summoning sickness and cannot be blocked and killed by an opponent

Steps

1. Declare Crystalline Crawler as an attacker
2. Byrke's second ability triggers, doubling the number of +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 , causing you to untap all creatures you control and to get an additional combat phase after this one
6. Repeat
7. If Crystalline Crawler has at least six +1/+1 counters on it, this combo nets infinite +1/+1 counter doubling

Results

• 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 that have a +1/+1 counter on them