Long time GM here and I'm at a loss how to recalculate the CR of an adult white dragon...
TL;DR:
The party, after several encounters with the beast left his wing crippled, and unable to fly, and applied Bestow Curse on him, the one that he has a 50% chance of doing nothing for a round.
The beast is CR 10 (Adult White Dragon).
I have no idea where to begin to recalculate the CR - his DR/SR/Immunity remain unaffected.
Long version:
Through a series of poor decisions and bad rolls, the party encountered the white dragon, then angered it, but fought it off after it killed two of their casters.
Two weeks later after healing up and reincarnating friends, they made a plan to scry on him, teleport into his lair and kill him there - this failed as they did not successfully teleport the entire group there, so he then scattered the half of the party that *did* arrive and killed two more of their members.
Over the next two days, The dragon tracked them through the canyons of his mountain home, found two more members, killed one, but they successfully crippled his wing. So he captured the healer, imprisoned her and instructed her to cast restoration on him.
When she finally got the spell prepared and ready to cast, she instead cast bestow curse, got bit for her trouble, and successfully fled.
I have little doubt the party will try and find the dragon again, and with the goal of giving him a full beat-down. I want to set the CR correctly - I don't think it should be CR 10.
