My boyfriend and I had an idea for a prestige class that works with the BoED. We're tentatively calling it "Vowbreaker". Basically, a character who's broken a sacred vow (or a paladin's code, or something) decides not to repent and pursues power for him or herself.

The problem is, we don't have a clue what sort of class abilities we could base around a "vowbreaker". We were thinking about making the character take and break vows at each level (it's only about 5 levels) to get benefits, but we want something that stands out, too.

Creative input is desperately needed.