Two words... Exploding dinosaurs!
Advanced Bloody Fiery Skeletal Champion Tyrannosaurus CR 12
NE Gargantuan Undead
Init +8; Senses low-light vision, scent; Perception +37
AC 32, touch 10, flat-footed 28 (+4 Dex, +22 natural, –4 size)
hp 170 (18d8+72 +2d8+8) fast healing 10
DR 5/bludgeoning
Fort +10, Ref +10, Will +16
Speed 40 ft.
Melee bite +25 (4d6+28 +1d6 fire/19–20 plus grab)
Space 20 ft.; Reach 20 ft.
Special Attacks swallow whole (2d8+14, AC 17, hp 15)
Str 38, Dex 19, Con 0, Int 2, Wis 19, Cha 18
Base Atk +15; CMB +33 (+37 grapple); CMD 47
Feats Bleeding Critical, Critical Focus, Diehard, Endurance, Improved Critical (bite), Improved Initiative, Iron Will, Run, Skill Focus (Perception), Vital Strike
Skills Perception +37; Racial Modifiers +8 Perception
SPECIAL ABILITIES
Powerful Bite (Ex) A tyrannosaurus applies twice its Strength modifier to bite damage.
Deathless (Su): A bloody skeleton is destroyed when reduced to 0 hit points, but it returns to unlife 1 hour later at 1 hit point, allowing its fast healing thereafter to resume healing it. A bloody skeleton can be permanently destroyed if it is destroyed by positive energy, if it is reduced to 0 hit points in the area of a bless or hallow spell, or if its remains are sprinkled with a vial of holy water.
Fiery Aura (Ex): Creatures adjacent to a burning skeleton take 1d6 points of fire damage at the start of their turn. Anyone striking a burning skeleton with an unarmed strike or natural attack takes 1d6 points of fire damage.
Fiery Death (Su): A burning skeleton explodes into a burst of flame when it dies. Anyone adjacent to the skeleton when it is destroyed takes 10d6 points of fire damage DC 24 Reflex half damage