Bies

Aggresive. As a bonus action, the creature can move up to its speed toward a hostile creature it can see.

Regeneration. At the beginning of the creature's turn, it regains 6 hit points.

Multiattack. Bies uses his Third Eye and makes two claw attacks.

Antlers. Melee Weapon Attack: +11 to hit, reach 5 ft., one target. Hit: 20 (3d8 + 7) piercing damage. 

Claws. Melee Weapon Attack: +11 to hit, reach 5 ft., one target. Hit: 21 (4d7 + 7) slashing damage. 

Third Eye. Bies magically forces a creature it can see within 60 feet of it to make a DC 15 Wisdom saving throw. in case of failure the target is under one of the following effects, chosen by rolling 1d4:

• Asleep. The target falls unconscious. It wakes up if it takes any damage or if another creature uses its action to shake the sleeper awake.
• Panicked. On each of its turns, the frightened creature must take the Dash action and move away from the bies by the safest and shortest available route, unless there is nowhere to move. If the target moves to a place at least 60 feet away from bies where it can no longer see it, this effect ends.
• Sickened. The target has disadvantage on attack rolls and ability checks. At the end of each of its turns, it can make another Wisdom saving throw. If it succeeds, the effect ends.
• Feeblemind. The target takes 14 (4d6) psychic damage.