Dawnsire, Sunstar Dreadnought, Vigor, Crystalline Crawler, and Najeela, the Blade-Blossom

Prerequisites

• Dawnsire, Sunstar Dreadnought on the battlefield
• Vigor on the battlefield
• Crystalline Crawler on the battlefield
• Najeela, the Blade-Blossom on the battlefield

Steps

1. Declare any creature as an attacker, triggering Najeela if the creature was a Warrior and Dawnsire
2. Resolve the Najeela trigger, if applicable, creating a 1/1 Warrior creature token that is tapped and attacking
3. Resolve the Dawnsire trigger, attempting to deal 100 damage to Crystalline Crawler, which will result in 100 +1/+1 counters being placed on it instead due to Vigor
4. Holding priority, activate Crystalline Crawler's first ability five times by removing five +1/+1 counters from it, adding
5. Activate Najeela by paying , untapping all attacking creatures, giving them trample, lifelink and haste, and causing you to get an additional combat phase after this one
6. Repeat each combat phase

Results

• Infinite ETB
• Infinite colored mana
• Infinite combat phases
• Infinite creature tokens with haste
• Infinite +1/+1 counters