Nightmare Spinner. 3/day make someone die of fright. The DC's kinda crap though, even if you are a Sorc (15+CHA mod).
Dipping Nightmare Spinner is the capstone with Bonus Spells.
Master of the silent sound (dragon 297).
Looks like a typical "trade four levels of spellcasting for some mostly useless abilities" class.
The capstone ability is a 1/day spell-like ability.
It replicates any spell of 9th level or lower. As a full round action. With CL = character level.
Sounds a bit like the the Divine Agent PrC. They get to cast Gate as an SLA, even a bit before the last level.
Shadow Sun Ninja would be cool if you could still control yourself after becoming a vampire. Nominate for worst capstone.
Except for Walker in the Wastes which is well worth it.
Cha to HP is baaaaaaaaaaaalllllllllllllllls awesome.
Beauty's Bounty.
Note: Cha is worthless except for those with that stat as their spellcasting stat or faces, and faces in DND are a joke with the advent of Diplomancy. Dragonwrought Kobolds are also...