Breathsnatcher

They average 6 feet tall and weigh about 150 pounds.
Species Traits
Breathsnatchers have the following traits:
Clawing Smoke (Su): Once every 1d4 rounds, a breathsnatcher can expel a 30-foot cone of magic smoke. The smoke grants one-half concealment to creatures in its periphery and full concealment to characters obscured by more than 5 feet of smoke. In addition, any creature within the cone must succeed at a Fortitude save (DC 14) or get smoke in their lungs.
Holding one's breath doesn't help, as tendrils of smoke actively try to invade the lungs. This magic smoke begins to rip at the lungs and surrounding organs, dealing 3d4 points of damage per round. The affected creature can attempt another Fortitude save each subsequent round to cough out the semivaporous menace.
Snatch Breath (Su): As a full-round action, the breathsnatcher can steal the breath from any adjacent creature with -1 or fewer hit points. This instantly kills the creature and grants the breathsnatcher damage reduction 15/+1 for 1 hour per Hit Die of the victim.
Fast Healing 5 (Ex): A breathsnatcher heals 5 points of damage each round so long as it has at least 1 hit point remaining.
Breathsnatcher: CR 6; Medium monstrous humanoid; HD 9d8; hp 40; Mas 10; Init +3; Spd 30 ft.; Defense 17, touch 13, flat-footed 14 (+3 Dex, +3 natural, +1 equipment); BAB +9; Grap +11; Atk +11 melee (1d4+2, knife) or +12 ranged (2d6, MAC Ingram M10) or +8 ranged (4d6, MAC Ingram M10 burst); Full Atk +11/+6 melee (1d4+2, knife) or +12/+7 ranged (2d6, MAC Ingram M10) or +8/+3 ranged (4d6, MAC Ingram M10 burst); FS 5 ft. by 5 ft.; Reach 5 ft.; SQ clawing smoke, snatch breath, fast healing 5; AL evil; SV Fort +3, Ref +9, Will +9; AP 0; Rep +0; Str 14, Dex 17, Con 10, Int 13, Wis 16, Cha 9.
Skills: Hide +14, Listen +14, Move Silently +14, Read/Write English, Read/Write Language (any one), Speak English, Speak Language (any one), Spot +12.
Feats: Advanced Firearms Proficiency, Burst Fire, Personal Firearms Proficiency, Quick Draw, Simple Weapons Proficiency.
Possessions: Leather trenchcoat, knife, MAC Ingram M10 (.45 machine pistol) with suppressor.
Advancement: By character class.
Breathsnatcher Infiltrator 4: CR 10; Medium monstrous humanoid; HD 9d8 plus 4d8; hp 58; Mas 10; Init +4; Spd 30 ft.; Defense 21, touch 17, flat-footed 17 (+4 Dex, +3 class, +3 natural, +1 equipment); BAB +11; Grap +13; Atk +13 melee (1d4+2/19-20, knife) or +15 ranged (2d6, MAC Ingram M10) or +11 ranged (4d6, MAC Ingram M10 burst); Full Atk +13/+8 melee (1d4+2/19-20, knife) or +15/+10 ranged (2d6, MAC Ingram M10) or +11/+6 ranged (4d6, MAC Ingram M10 burst); FS 5 ft. by 5 ft.; Reach 5 ft.; SQ clawing smoke, snatch breath, fast healing 5, sweep, improvised implements, improved evasion; AL evil; SV Fort +4, Ref +14, Will +10; AP 2; Rep +2; Str 14, Dex 18, Con 10, Int 13, Wis 16, Cha 9.
Skills: Climb +9, Escape Artist +11, Hide +17, Jump +9, Listen +14, Move Silently +17, Read/Write English, Read/Write Language (any one), Sleight of Hand +11, Speak English, Speak Language (any one), Spot +12.
Feats: Advanced Firearms Proficiency, Burst Fire, Personal Firearms Proficiency, Quick Draw, Simple Weapons Proficiency, Stealthy, Strafe.
Possessions: Leather trenchcoat, knife, MAC Ingram M10 (.45 machine pistol) with suppressor.