Dimetrodon

D&D 2024 monster: Dimetrodon. Source: Mordenkainen Presents: Monsters of the Multiverse. challenge rating 1/4, creature type Beast (Dinosaur), Medium size, s... This sail-backed reptile is commonly found in areas where dinosaurs live. It hunts on shores and in shallow water, filling a similar role to a crocodile. Beast (Dinosaur) Medium 30 ft., swim 20 ft.