Two Ability Points every four levels
No restriction on Improved Toughness
Knowledge: Undead Bonus
Lightbringer members receive a +1 bonus to knowledge checks concerning undead for every 5 undead killed, starting at +1. Non-members receive a +1 bonus for every 10 undead killed, starting at 0. If you don’t have Knowledge: Religion as a class skill, then you get Knowledge: Undead as a class skill.