Sources
CR
Type
Size
Alignment
Movement

Hippopotamus

Huge Beast, Unaligned

Armor Class 12 (natural armor)
Hit Points 76 (8d12 + 24)
Speed 40 ft., swim 30 ft.
STR
22
+6
DEX
9
-1
CON
17
+3
INT
3
-4
WIS
11
+0
CHA
6
-2
Senses passive Perception 10
Languages
Challenge 4 (1,100 XP)

Traits

Trampling Charge. If the hippopotamus moves at least 20 feet straight toward a creature and then hits it with a bite attack on the same turn, that target must succeed on a DC 12 Strength saving throw or be knocked prone. If the target is prone, the hippopotamus can make one stomp attack against it as a bonus action.

Hold Breath. The hippopotamus can hold its breath for 30 minutes.

Actions

Bite. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit:19 (3d8 + 6) piercing damage.

Stomp. Melee Weapon Attack: +8 to hit, reach 5 ft., one prone creature. Hit:22 (3d10 + 6) bludgeoning damage.