D&D 4E 4E Sample Combat: The Terrasque

[Dyrvom]

It sounded like the Tarrasque gained net vulnerability 1 to everything in the first round (from the Warlock), but you kept subtracting 10 from all damage and stopped adding 11 half way through round 2. Did I misread something?

Edit: Ahh, you didn't mention the duration on SoF. You had for other powers, so I assumed it was static when you didn't. My bad.