Pachycephalosaurus

This bipedal reptile has a rounded, dome-like head adorned with bony frills and ridges.
 

Pachycephalosaurus (CR 4)

Large Animal
Alignment: Neutral
Initiative: +2
Senses: Low-Light Vision, Scent; Perception +8
  Speed: 40 feet
Space: 10 feet
 

Defense

Armor Class: 17, touch 11, flat-footed 15 (+2 Dex, +6 natural, -1 size)
Hit Points: 37 (5d8+15)
Saving Throws: Fort +7, Ref +6, Will +2
 

Offense

Melee: slam +8 (2d6+9)
Reach: 10 feet
  Special Attacks: clobbering charge
 

Statistics

StrDexConIntWisCha
22 (+6) 15 (+2) 17 (+3) 2 (-4) 12 (+1) 5 (-3)
Base Attack Bonus: +3
CMB +10
CMD 22
  Feats: Powerful Maneuvers, Run
  Skills: Perception +8, Stealth +2
  Languages:
 

Special Abilities

Clobbering Charge (Ex)

When a pachycephalosaurus hits a target with its slam attack at the end of a charge, it can initiate a bull rush as a free action to move the struck target back in the same direction as the dinosaur's charge. The pachycephalosaurus cannot move with the target of the bull rush. If a pachycephalosaurus scores a critical hit against a creature with its slam attack at the end of a charge, it also staggers the target for 1 round. If the victim succeeds at a DC 18 Fortitude save, the stagger effect is negated, but the victim still suffers the effects of the dinosaur's bull rush attempt. The save DC is Strength-based.
 

Ecology

Environment: Warm or Temperate Plains
Organization: solitary or pair
Treasure: none

  A pachycephalosaurus is a normally peaceful dinosaur that grows irate and violent during mating season or when its herd is intruded upon by potential predators. The dinosaur's skull has a distinctive dome-shaped crown surrounded by numerous bony horns- this, combined with the dinosaur's powerful, compact neck, allows it to make battering-ram-like charges capable of inf licting great damage.
  Pachycephalosauruses grow to a length of 15 feet and weigh 1,400 pounds.
  Pachycephalosaurus Companions
  Starting Statistics: Size Medium; Speed 30 ft.; AC +3 natural armor; Attack gore (1d8 Ability Scores Str 15, Dex 16, Con 13, Int 2, Wis 12, Cha 5.
  7th-Level Advancement: Size Large; AC +2 natural armor; Attack gore (1d10 Ability Scores Str +8, Dex -2, Con +4; Special Qualities clobbering charge.