In Elder Evils, there is a bodak blackguard who has a really cool mount. It's a flying construct with a nightwing's essence bonded to it. Very reminiscent (perhaps borderline steal?) of the Hobgoblin. ...
I've been doing some theory-crafting and attempting to build a high-level villain as a gestalt character, and I'm not sure the combo I was planning on using actually works. In the Book of Vile ...