That's strange :? I used around 4000 chaos runes in Castle Wars a few weeks ago, and my Ahrim's degraded from 75 to 25. I wasn't being attacked most of the time. A few months ago, I was using Ice Burst with my new Ahrim's (No number shown) and it degraded once I cast a spell. No green bar there, either. yea it think it's that because the first time you use dharoks after you repair it, as soon as you hit the enemy it doesn't degrade but you don't get the green bar untill you get hit back