Oh so happy I am.
Dacentrus
Large Animal
Hit Dice: 6d8+24 (51 hp)
Initiative: +0
Speed: 30ft (6 squares)
Armor Class: 16 (-1 size, +7 natural), touch 9, flat-footed 16
Base Attack/Grapple: +4/+14
Attack: Tail spike +9 melee (2d6+9, 19-20 x3)
Full Attack: Tail spike +9 melee (2d6+9, 19-20 x3)
Space/Reach: 10ft/5ft
Special Attacks: Augmented critical
Special Qualities: Fortification, low-light vision, scent, spiny defense
Saves: Fort +11, Ref +5, Will +3
Abilities: Str 23, Dex 11, Con 19, Int 1, Wis 13, Cha 4
Skills: Listen +9, Spot +9
Feats: Alertness, Great Fortitude, Run
Environment: Warm forests
Organization: Solitary, pair or herd (4-7)
Challenge Rating: 5
Treasure: None
Alignment: Always neutral
Advancement: 7-12 HD (Large), 13-18 HD (Huge)
Level Adjustment: -
This strange quadruped has a horizontal body with small bony plates on its back up to its hind legs. From this point leading down to the tail, it has long, sharp spikes. Its head is small and horse-like, and its pebbly skin is marked with stripes.
Dacentrus is one of the more primitive stegosaurs, whose descendants include stegosaurus and kentrosaurus.
A dacentrus is about 15 feet long and weighs up to three tons. They are docile herbivores, browsing through jungles and scrub forests in small herds. If provoked, however, they are deadly, lashing out with their spiked tails.
Combat
If threatened, a dacentrus will assume a defensive position, always keeping its tail facing its enemies. If badly outnumbered or surrounded, it flees, as it is both weaker and faster than its larger kin.
Augmented Critical (Ex): The spikes on the tail of a dacentrus are keen and as sharp as picks. They threaten a critical hit on a 19-20 and deal x3 damage on a successful critical hit.
Fortification (Ex): The bony plates on the neck and shoulders of a dacentrus help to protect its spine from injury. Any critical hit or sneak attack made against the dacentrus has a 10% chance of failing, dealing only normal damage.
Spiny Defense (Ex): Any creature that hits a dacentrus in melee with a handheld or natural weapon (but not a reach weapon) takes 1d6+6 points of damage from the creature’s broad spines.
I have no idea what I was thinking when I gave this Run. No idea... Perhaps Weapon Focus (tail)?