Confrontation with a Leader

On a lonely island, there was nothing but mountains that pierced the heavens and was home to millions of "extinct species". Anyone who entered the island could see hundreds of pterodactyls flying in the skies and in some parts of the mountains, where vast plains lied, hundreds of Spinosaurus were fighting each other. This mountain was home to many water dinosaurs, flying dinosaurs and land dinosaurs. However, there were two of the most deadliest creatures in these mountains, the tyrannosaurus in the center of the island and a huge fire breathing dragon inside the mountains. It was deadly for anyone to go inside this island, even Shinobi, mainly because these dinosaurs were immune to the Chakra based abilities of Shinobi, but for unknown reasons.