Quilled Greatwurm, Crystalline Crawler, and Hellkite Charger

Prerequisites

• Quilled Greatwurm on the battlefield
• Crystalline Crawler on the battlefield
• Hellkite Charger on the battlefield
• Crystalline Crawler has power 7 or greater, does not have summoning sickness, and cannot be blocked and killed by an opponent
• available

Steps

1. Declare Crystalline Crawler and Hellkite Charger as attackers
2. Hellkite Charger triggers, causing you to pay to untap all attacking creatures and to get an additional combat phase after this one
3. Deal combat damage using Crystalline Crawler
4. Quilled Greatwurm triggers, putting that many +1/+1 counters on Crystalline Crawler
5. Move to your next combat phase, and declare Crystalline Crawler and Hellkite Charger as attackers
6. Hellkite Charger triggers, holding priority, activate Crystalline Crawler's first ability seven times by removing five +1/+1 counters from it, adding
7. Resolve the Hellkite Charger trigger, causing you to pay to untap all attacking creatures and to get an additional combat phase after this one
8. Repeat from step 3

Results

• Infinite ETB
• Infinite colored mana
• Infinite combat phases
• Infinite creature tokens with haste
• Infinite combat damage
• Infinite +1/+1 counters on Crystalline Crawler