[Helios]

Let's me sum it up

The villains are skeletal dinosaur monsters. The generals are stronger and there is a aquatic one, carnivorous one, herbivorous one, and omnivorous one. The leader is a fusion of different dinosaurs. They were defeated by the predecessors of the human race who were led by the Shaman using magic. The dinosaurs woke up after millions of years because the hibernation spell faded off. The magic of the Shaman caused the dinosaurs to mutate. The Shaman died trying to save the ancient humans. Now the Extinct want to take back their spot as the strongest race on Earth by killing the modern humans.

I decided to get rid of the Shaman in modern day. Let's say he died millions of years ago. If we include him, then the whole tech aspect of the rider will be gone and it will be magic vs magic.