Fabershare

After dying following a car accident, Fen Chiang finds himself in a limbo between the afterlife and the mortal world where he meets God, who makes him a strange request: to immediately reincarnate in a world called Eden, where all species that existed on Earth (dinosaurs, prehistoric mammals, synapsids, pterosaurs, etc.) coexist together, to save it from the human beings who are destroying it due to excessive pollution. Armed with his knowledge and a System, our hero, now reincarnated as a spinosaurus named Sobek, must embark on a difficult journey to reunite the dinosaurs and curb humanity's greed. However, defeating the most powerful species that ever existed will not be an easy task even for a dinosaur army, and surely humanity will not abandon the title of dominant species very easily...

I'm a spinosaurus with a System to raise a dinosaur army

If anyone had decided to pass near the South Sea that day, they would have witnessed an unprecedented sight. The sea water had turned red, so dark that you couldn't look under it. Thousands of corpses of huge ships lay in the water; most of them were submerged, but some protruded from the ocean since the seabed was so covered with wrecks that it was impossible to descend further. Fish and other sea creatures moved frantically through that graveyard of ships, devouring the remains of all the humans who had been aboard. And out of the water some aquatic dinosaurs wandered among the remains of the ships not yet submerged, looking for any survivors. 


Total victory