INDOMINUS REX CR 12
N Gargantuan animal
Init +5; Senses low-light vision, scent; Perception +37
AC 21, touch 7, flat-footed 20 (+1 Dex, +14 natural, –4 size)
hp 230 (20d8+140)
Fort +19, Ref +13, Will +10
Defensive Abilities fortification (50%)
Speed 40 ft.
Melee bite +27 (4d6+32/19–20 plus grab), 2 foreclaws +25 (2d6+8 plus grab), tail slap +25 (2d8+8)
Space 20 ft.; Reach 20 ft.
Special Attacks swallow whole (2d8+16, AC 17, hp 23), Roar
Str 42, Dex 13, Con 24, Int 2, Wis 15, Cha 10
Base Atk +15; CMB +35 (+39 grapple); CMD 46
Feats Awesome BlowB, Bleeding Critical, Critical Focus, Diehard, Endurance, Improved Critical (bite), Improved Initiative, Iron Will, Multiattack, Run, Skill Focus (Perception)
Skills Intimidate +10, Perception +37; Racial Modifiers +8 Intimidate, +8 Perception
SQ camouflage, powerful bite
Environment warm forest and plains
Organization solitary, pair, or pack (3–6)
Awesome Blow (Ex): An indominus rex gains awesome blow as a bonus feat. It can use any of its natural attacks to send creatures that are Large sized or smaller flying 10 feet into the air, as the feat in all other respects.
Camouflage (Ex) An indominus rex can take one minute to blend in with natural foliage to gain a +4 bonus on Stealth checks.
Powerful Bite (Ex) An indominus applies twice its Strength modifier to bite damage.
Roar (Ex) As a standard action, an indominus can unleash a terrifying roar. All creatures within 100 feet with fewer HD than the indominus rex become shaken until out of range unless they succeed on a Will save (DC 27). The save DC is Constitution-based.
The indominus rex is an apex predator that measures 40 feet long and weighs 18,000 pounds.
Creation Notes: I based this off the T-Rex. Not sure if I did this right or if the CR is correct.