Hell Hound
medium Fiend
Armor Class 15 (natural armor)
Hit Points 76
Speed walk +50
Challenge 3
Saving Throws cha -2, con +2, dex +1, int -2, str +5, wis +3
Damage Immunities fire,charmed,frightened
Senses darkvision 60 ft.
Languages understands Infernal but can't speak
Special Abilities
Pack Tactics. The hound has advantage on an attack roll against a creature if at least one of the hound's allies is within 5 feet of the creature and the ally isn't incapacitated.
Prey Sense. The hound can pinpoint, by scent, the location of Medium and smaller creatures within 30 feet of it.
Actions
Multiattack. The hell hound makes two Bite attacks.
Bite. _Melee Weapon Attack:_ +5 to hit, reach 5 ft., one target. _Hit:_ 7 (1d8+3) piercing damage plus 7 (2d6) fire damage.
Fire Breath (Recharge 5-6). The hound exhales fire in a 15foot cone. Each creature in that area must make a DC 13 DEX save, taking 21 (6d6) fire damage on a failed save, or half as much damage on a successful one.
Source: Black Flag SRD · OGL/Open