The Inostrancevia was a bear-sized Saber-toothed apex predator. It was a mix between mammals and reptiles, with a bulky but dinosaur like build and a small amount of hair. They had Saber teeth used to stab, attack, and kill prey. They were like Saber-toothed tigers but more efficient and reckless. They constantly regrew their teeth like sharks. They were ambush predators that were good at hiding and knew when to strike. There sense of smell was incredibly good and helped them hunt.