Psycho Killer

For 1 minute after you kill a creature the adrenaline flowing through your veins allows you to push yourself over your limits. You can make 1 other action on your turns and you cannot be possessed, confused or affected by spells or effects that would alter the control over your mind like dominate person, suggestion..etc... Also you are immune to being frightened, charmed or exhausted. 

Decrease your Wisdom ability score by 1 permanently f you don't kill any creature for 24 hours (this effect stacks).