Brontosaurus

Volo's Guide to Monsters p. 139,

Size
Gargantuan
Type
beast
Alignment
unaligned
AC
15 (natural armor)
Hit Points
121 (9d20+27)
Speed
walk 30 ft.
Saving Throws
Con +6
Passive Perception
10
Challenge
5
Lineage
Dinosaur
Environment
grassland, forest
STR
21
+5
DEX
9
−1
CON
17
+3
INT
2
−4
WIS
10
+0
CHA
7
−2

Actions

Stomp

Melee Weapon Attack: +8 to hit, reach 20 ft., one target. Hit: 27 (5d8 + 5) bludgeoning damage, and the target must succeed on a DC 14 Strength saving throw or be knocked prone.

Tail

Melee Weapon Attack: +8 to hit, reach 20 ft., one target. Hit: 32 (6d8 + 5) bludgeoning damage.

Other data

description

This massive four-legged dinosaur is large enough that most predators leave it alone. Its deadly tail can drive away or kill smaller threats.