Butterfly Blade

A butterfly blade gains the stalker class feature at 1st level, rather than at 7th level. The butterfly blade doesn't add his studied target bonus on Knowledge or Survival checks. This ability alters studied target and replaces track. Bonus Feats: Whenever a butterfly blade would gain a slayer talent, he can instead select a feat from the following list: Cutting Humiliation, Enforcer, Intimidating Prowess, Nerve-Racking Negotiator, or Threatening Negotiator. The butterfly blade does not need to meet the feat's prerequisites. This alters slayer talents.

Butterfly blades train to inflict painful cuts rather than lethal ones. A butterfly blade can deal nonlethal damage with butterfly swords without taking a penalty on attack rolls. At 3rd level, a butterfly blade gets a +1 bonus on attack rolls with butterfly swords, and the damage die of any butterfly sword he wields increases by one step; at 9th level and again at 15th level, the attack bonus increases by 1 and the damage die increases by an additional step. At 6th level, the butterfly blade gains the knockout class feature, as per a brawler of his class level - 2. This ability replaces sneak attack.

At 7th level, a butterfly blade can use aura of the unremarkable once per day as a spell-like ability. At 11th level, he can use it twice per day, and at 14th level, it becomes a constant spell-like ability that he can activate or deactivate as a free action. The ability's caster level is equal to his slayer class level, and the DC is equal to 10 + the number of ranks the butterfly blade has in either Bluff or Intimidate, whichever is higher. This ability replaces stalker, swift tracker, and quarry.

At 19th level, a butterfly blade becomes a bloody whirlwind in combat. When he strikes a foe with a butterfly sword, he automatically confirms critical threats. In addition, any butterfly sword he wields is treated as if it has the speed weapon special ability. If the weapon already has the speed weapon special ability, this doesn't stack. This ability replaces improved quarry.