As slaves of capricious oni lords, your ancestors were forced to yield to their masters’ hedonistic desires, inevitably tainting their descendants with oni blood. Now, you wield the powers of the oni thanks to your vile heritage.
Bloodline Skill: Con
Requirements: CST 2, Con 4, 10 EXP
You may use Con in place of Stealth in any settlement - towns, castles, villages, goblin caves, necromancer towers, and any other settled location, at GM discretion.
Requirements: Infiltrate, CST 5, Con 8, 15 EXP
When you inflict hitpoints damage to a creature, you may spend 2 MP/TP as an Immediate Action to “twist the knife,” literally or figuratively. This causes the creature to become staggered for the next 2d4 rounds (no save).
Requirements: Touch of Agony, CST 10, Con 12, 20 EXP
You gain the piercing eyes of an oni, providing you with Darkvision.
Requirements: Altered Form, CST 15, Con 16, 25 EXP
For a number of rounds per day equal to your CL/Prowess, you may become a gaseous cloud of dark energy. You may still perceive as normal and also cast spells in this form, and you may float at a speed of 30 ft. This ability otherwise functions as Gaseous Form. The rounds do not need to be consecutive.
Requirements: Windborne, CST 20, Con 20, 30 EXP
You become a master of infiltration, using Con to disguise is now always a Free Action for you.
Additionally, once per day, as an Immediate Action upon taking damage, you may enter a frenzy, which grants you Fast Healing 2 for a number of rounds equal to your CL/Prowess. While in this state, you do not fall unconscious from reaching zero wounds. However, you do immediately when this ability expires, if you are still in negatives at that time. If you reach a number of negative Wounds equal to your Constitution score, you suffer the resulting effects as normal.