Rhinoceros
Large Beast
Armor Class 12
Hit Points 45 (6d10+12)
Speed walk +40
Challenge 2
STR
20
+5
DEX
8
-1
CON
14
+2
INT
2
-4
WIS
12
+1
CHA
4
-3
Senses passive Perception 11
Actions
Gore. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 14 (2d8+5) bludgeoning damage. If the rhinoceros moves at least 20 feet straight towards the target before the attack the attack deals an extra 4 (1d8) bludgeoning damage and the target makes a DC 15 Strength saving throw falling prone on a failure.
Source: Level Up Advanced 5e Monstrous Menagerie · OGL/Open