Bull Mastiff, Giant Fiendish

The deep-throated rumbling growl of the mastiff announces its presence. What a prodigious beast! The canine stands at least four feet at the shoulder, and it is easily twice as long from snout to snub tail. Its blood-red eyes lock onto you as its powerful body tenses for the attack.

Giant Fiendish Bull Mastiff CR 1

XP 400
N Large animal
Init +1; Senses darkvision 60 ft., low-light vision, scent; Perception +8

AC 15, touch 11, flat-footed 15 (+1 Dex, +4 natural)
hp 17 (2d8+8)
Fort +7, Ref +4, Will +1
Defensive Abilities tenacious; Resist cold 5, fire 5; SR 6

Speed 40 ft.
Melee bite +5 (1d8+6 plus trip)
Special Attacks smite good

Str 19, Dex 13, Con 19, Int 2, Wis 12, Cha 6
Base Atk +1; CMB +5; CMD 16 (20 vs. trip)
Feats Skill Focus (Perception)
Skills Acrobatics +4 (+12 jumping), Perception +8, Survival +2 (+6 scent tracking); Racial Modifiers +4 Acrobatics when jumping, +4 Survival when tracking by scent

Smite Good (Su)

Once per day, the fiendish creature may smite a good-aligned creature. As a swift action, the creature chooses one target within sight to smite. If this target is good, the creature adds its Charisma bonus (if any) to attack rolls and gains a damage bonus equal to its HD against that foe. This effect persists until the target is dead or the creature rests.

Tenacious (Ex)

When ordered to track prey (usually humanoid prey), a bull mastiff receives a +4 bonus to any Will saves against enchantments or illusions directed at it, and the DC of any Handle Animal skill check by anyone other than the dog’s master is 5 higher.

Environment any
Organization solitary, pair, or pack (2-8)
Treasure none

Infernal hounds are monstrous bull mastiffs with hell-tainted blood. They are often domesticated by evil masters, especially druids and rangers. Rumor has it that there is a wicked order of cavaliers who ride infernal hounds instead of warhorses.

Quid Novi VI, Volume II