Maester Seymour + Crystalline Crawler + Aggravated Assault

Prerequisites

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Steps

1. 1At the beginning of your combat phase, Maester Seymour triggers, putting at least five +1/+1 counters on Crystalline Crawler.
2. 2Move to your postcombat main phase.
3. 3Activate Crystalline Crawler's first ability five times by removing five +1/+1 counters from it, adding .
4. 4Activate Aggravated Assault by paying , untapping all creatures you control and causing you to get an additional combat and main phase after this one.
5. 5Repeat.

Effects

• 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