Quote Originally Posted by ViperMagnum357 View Post
DMG 3.5, SRD, and Rules Compendium all simply say HD, no mention of RHD at all in (Su) DC calculation. Any RHD mention should be an exception in a particular entry.
Well, that means that the DC should sacle with class levels, which is nice.

I've seen stats blocks that only use RHD, but as we all know, stat blocks are notoriously wonky...