Titanosaurus (5e Creature)
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Gargantuan beast (sauropod), unaligned
Saving Throws Str +18, Con +18, Wis +14
Immensity. Creatures that are not flying have disadvantage on attacks against the Titanosaur.
Legendary Resistance (2/Day). If the titanosaur fails a saving throw, it can choose to succeed instead.
Thick Skin. If an attack deals less than 45 damage to the titanosaur, the damage is reduced to 5 (before resistances).
Multiattack. The titanosaur makes two attacks: one with its stomp and one with its tail.
Stomp. Melee Weapon Attack: +17 to hit, reach 10 ft., one target. Hit: 163 (28d10 + 9) bludgeoning damage. If target is a creature, it must succeed on a DC 24 Strength saving throw or be knocked prone. If the creature is already prone any hit with this attack counts as a critical hit.
Tail. Melee Weapon Attack: +17 to hit, reach 40 ft., one target. Hit: 87 (14d10 + 9) bludgeoning damage, and each creature within 60 feet of the titanosaurus must succeed on a DC 23 Constitution saving throw or take 28 (5d10) thunder damage and be deafened for 1 minute. An affected creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.
The Titanosaurus is essentially a walking mountain, it is the largest sauropod in all of the planes that has developed armored plates of solid bone all over its body. Between its size and armor, it is near impossible to kill. Once they are fully grown, they have no predators, even dragons ignore it! However, the young are not cared for by parents, leaving them as a walking buffet for many predators around the flatlands of Chuult.