Bloody Stag

Bloodied Nose. The stag has advantage on Wisdom (Perception) checks that rely on smell, and can tell the location of any wounded and bleeding creature within 300 feet. 

Fury of The Boyar. When wounded, this creature has advantage on constitution saving throws.

Burned Beast. Every turn the Bloody Stag starts with less than half of it's hit points, make a wisdom saving throw DC 12. Upon a failure, the Bloody Stag immediatly spends both of it's attacks attacking the closest creature. If no creature is in range, it will spend it's movement, and if required the dash action, to get into range with the closest creature, and will, if it has it's action, attack it.  

Gore. If the goat moves at least 20 feet straight toward a target and then hits it with a ram attack on the same turn, the target takes an extra 5 (2d4) bludgeoning damage. If the target is a creature, it must succeed on a DC 13 Strength saving throw or be knocked prone

Multiattack. The Bloody Stag makes one attack with it's antlers, and one with it's hooves. 

Antlers. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 10 (1d8 + 3) piercing damage.

Hooves. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 7 (1d6 + 3) bludgeoning damage.