The new Pathfinder RPG book, Ultimate Campaign, has something cool called Story Feats: 28 feats that give you an initial Benefit but get more powerful (an additional Completion Benefit) if you accomplish some goal that is important to your character. If you want to see the rest, ask to look at my copy! They will also be posted on the Pathfinder PRD soon.
This feat is perfect for Devon and other Chaotic Evil students:
With their deaths, the pitiful wretches that inhabit this world open your path to greatness.
Prerequisite: You must slay at least 50 intelligent noncombatants for either your own personal gain or for no cause at all, or have the Bloodthirsty, First Kill, or The Kill background.
Benefit: You gain a +2 bonus on Intimidate checks. If you have 10 or more ranks in Intimidate, this bonus increases to +4. Each time you slay an intelligent creature, you gain a +1 bonus on attack rolls and caster level checks for 1 minute (this bonus does not stack with itself).
Goal: Slay at least 200 more intelligent noncombatants, then slay a challenging foe that seeks to either bring you to justice for your crimes or usurp your position.
Completion Benefit: Any shaken creature takes double the normal penalties when attacking you, making saves against your abilities, or resolving skill checks with you as a target.
Here is the feat Galen picked for Razor Coast:
You must prove yourself through single combat.
Prerequisite: You must have defeated a single challenging foe without any aid from another, or have the Champion of a God, Champion of the People, Competition Champion, or Gladiator background.
Benefit: As a swift action, you can declare a single combat challenge to one foe within 50 feet and in line of sight. Upon doing so, you gain a +1 bonus on attack rolls and a +1 dodge bonus to AC against that foe as long as no one else threatens that opponent or until the single combat challenge ends. If another combatant attacks you or your foe, the challenge ends and you take a -2 penalty on attack rolls and to AC for 1 round. Though you can declare a single combat challenge at will, once you declare it on a foe you can’t declare it on the same foe for another 24 hours.
Goal: Defeat an appropriate number of challenging foes in single combat. These combats must not be interrupted by other creatures, and the foes must not have already been substantially injured or impaired prior to combat with you.
Completion Benefit: Your bonuses for single combat increase to +2. In addition, any confirmed critical hits you make against such a foe deal an additional 1d6 points of damage.