Keen Hearing and Smell. The carnocervus has advantage on Wisdom (Perception) checks that rely on hearing or smell. Rampage. When the carnocervus reduces a creature to 0 hit points with a melee attack on its turn, the carnocervus can take a bonus action to move up to half its speed and make a bite attack.
Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 16 (3d8 + 3) piercing damage. Howl (Recharges After a Short or Long Rest). The carnocervus gains 2d4 temporary hit points. Each creature within 60 feet of the carnocervus must make a DC 13 Wisdom saving throw or become frightened for one minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on a success. If a creature succeeds on the saving throw or the effect ends for it, that creature becomes immune to the carnocervus's howl for 24 hours.