These spines would probably be used to ward off possible predators or to display defense in courtship rituals

rex "Tyrant Lizard") was one of the largest and most ferocious dinosaurs to exist on Earth during the Late Cretaceous Maastrichtian period

Altura 49 mm

It has been speculated that

It also had muscular arms with three fingers with claws up to 15 cm long

Megacerops Variant:Unprimed These spines would probably beMegacerops, which is also known as "Brontotherium", is an extinct genus of perissodactyl mammals that lived in North America during the Eocene period, approximately 37 to 33 million years ago. These massive herbivores are known for their large size and similar appearance to modern rhinos, although they are not directly related to them. Megacerops was one of the largest land mammals of its time, with a body length that could reach 4 meters and a height