Demons would be cool, but maybe too much. The party are of pretty low level, and they should be challenged but not defeated. The dragon wants to make followers; sheh doesn't have them yet.
Maybe a troll might work, though that's also way too high a CR for this party. I could work one down to, say, CR 4 or so, perhaps, by halving the hit points and dropping its attack bonus and such, I suppose.
What's the rule for CR adjustments for <CR 1 creatures? If I make a kobold a half-fiend, would it then be CR 2 1/8? That's an option; the dragon might have come across a band of fiendish kobolds or something. Though honestly, I think my group might have seen enough kobolds lately, and I'm certainly ready for something new.
Would leaving pools of acid about effectively lower the CR of a battle with a troll?
Maybe a troll might work, though that's also way too high a CR for this party. I could work one down to, say, CR 4 or so, perhaps, by halving the hit points and dropping its attack bonus and such, I suppose.
What's the rule for CR adjustments for <CR 1 creatures? If I make a kobold a half-fiend, would it then be CR 2 1/8? That's an option; the dragon might have come across a band of fiendish kobolds or something. Though honestly, I think my group might have seen enough kobolds lately, and I'm certainly ready for something new.
Would leaving pools of acid about effectively lower the CR of a battle with a troll?