Vastatosaurus Rex (5e Creature)
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Gargantuan monstrosity, unaligned
Saving Throws Str +9, Dex +5, Con +6
Fear Aura. Any creature hostile to the vastatosaurus that starts its turn within 20 feet of the vastatosaurus must make a DC 21 Wisdom saving throw, unless the vastatosaurus is incapacitated. On a failed save, the creature is frightened until the start of its next turn. If a creature's saving throw is successful, the creature is immune to the vastatosaurus' Fear Aura for the next 24 hours.
Siege Monster. The vastatosaurus deals double damage to objects and structures.
Multiattack. The vastatosaurus makes three attacks: one with its bite and two with its tail.
Bite. Melee Weapon Attack: +15 to hit, reach 10 ft., one target. Hit: 36 (4d12 + 10) piercing damage. If the target is a Medium or smaller creature, it is grappled (escape DC 20). Until the grapple ends, the target is restrained and the vastatosaurus can't bite another target.
Tail. Melee Weapon Attack: +15 to hit, reach 15 ft., one target. Hit: 29 (3d12 + 10) bludgeoning damage. If the target is a creature, it must succeed on a DC 20 Strength saving throw or be pushed up to 10 feet away from the vastatosaurus and knocked prone.
Towering over most predator dinosaurs, the vastatosaurus rex can reach up to 25 feet tall and be as long as 60 feet. These enormous creatures are thought to be evolved forms of the tyrannosaurus rex as they appear to be larger version of them. Although these dinosaurs are very rare, they exist and dwell either in deserts or jungles with a dense population of creatures that it feeds on. The vastatosaurus' favorite meal is other large dinosaurs and it must consume a ton of food every day in order to survive. It relies on its keen smell to hunt for prey. It has also the ability to regrow any lost teeth over the course of a few days. Despite its size, the vastatosaurus rex is very fast, adding to the many reasons this creature is one of the most feared dinosaurs.