Dawnsire, Sunstar Dreadnought, and Wrathful Red Dragon

Prerequisites

• Dawnsire, Sunstar Dreadnought on the battlefield
• Wrathful Red Dragon on the battlefield

Steps

1. Declare any creature as an attacker
2. Dawnsire triggers, dealing 100 damage to Wrathful Red Dragon
3. Wrathful Red Dragon triggers, dealing 100 damage to any target that isn't a Dragon

Results

• Near-infinite damage to any target