How can you create a combo with Byrke, Long Ear of the Law, Crystalline Crawler, Aggravated Assault?
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[START OF COMBO]This combo can be formed with Byrke, Long Ear of the Law, Crystalline Crawler, Aggravated Assault

Color identity: RGW
Mana cost: 
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 {3}{R}{R}.
  5. Activate Aggravated Assault by paying {3}{R}{R}, 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.[END OF COMBO STEPS]

Result:
  - 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[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be 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.
[END OF COMBO PREREQUISITES]
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