I really don't know how I can combine Prehistoric and undead without make it Not cringe...

so I just make the most generic idea ever... (caveman riding raptor fighting raptor skelatons) hope this still qualify though...

 

Story summary:

Me Chad, Me Cave Sleep. Cave Shake, fire hit, Ground burn. Sky Loud, Sky Break, Sun go. All Dark, Cold Come.
Big Bones in dirt. Long head, sharp teeth, big bite. No fur, no skin, Claw Hands, Long claws, Legs strong, fast run.
No Light, No Stars, Bones eat all. Little Chad Die, Big Boobs Die, All Cry, All Die, All gone...
Me Alone...
Me Angry...