Sanguine Butcher

School: transmutation [blood]
Level: sanguine sorcerer 5
Casting Time: 1 swift action
Components: V, S
Range: personal
Target: self
Duration: 1 round/level
Saving Throw: none
Spell Resistance: no
Description: You become affected by Sanguine Penetration and Sanguine Precision. Additionally, you gain a stack of Bloodlust.
Note: You can possess no more than [x] stacks of Bloodlust at any given time.
[x] is equal to your caster level divided by two (rounded down)

Sanguine Penetration
Whenever a being (excluding yourself) takes damage from a bleed effect that you had inflicted upon them, you gain a stack of Bloodlust.
Whenever you deal damage to a being that possesses damage reduction, you treat their damage reduction as though it were reduced by 2 for each stack of Bloodlust that you possess.
Whenever you deal damage to a being that possesses energy resistance, you treat their energy resistance as though it were reduced by 4 for each stack of Bloodlust that you possess.

Sanguine Precision
Whenever you sacrifice hitpoints via Blood Magic or Crimson Concentration, you gain a stack of Bloodlust.
Whenever you make an attack against a being that is concealed, you treat the probability of your attack failing to strike them as though it were reduced by 10% for each stack of Bloodlust that you possess.
Whenever you cast a spell that affects a being that is incorporeal, you treat the probability of your spell failing to affect them as though it were reduced by 10% for each stack of Bloodlust that you possess.