Bicornaclops

Charge. If the bicornaclops moves at least 20 feet straight toward a target and then hits it with a horn attack on the same turn, the target takes an extra 11 (2d10) piercing damage. If the target is a creature, it must succeed on a DC 15 Strength saving throw or be knocked prone.

Magic Resistance. The bicornaclops has advantage on saving throws against spells and other magical effects.

Magic Weapons. The bicornaclops' weapon attacks are magical.

Poor Depth Perception. The bicornaclops has disadvantage on any attack roll against a target more than 30 feet away.

Innate Spellcasting. The Bicornaclops' innate spellcasting ability is Wisdom (spell save DC 15, +7 to hit with spell attacks). The Bicornaclops can innately cast the following spells, requireing only verbal components:

Cantrips (at will): eldritch blast, vicious mockery
2/day each (# slots): ice knife, mind spike, shield
1/day each: dominate beast, lightning bolt

Multiattack. The bicornaclops makes three attacks: two with its horns, and one with its hooves.

Horn. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 11 (1d10 + 6) piercing damage.

Hooves. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 15 (2d8 + 6) bludgeoning damage, and if the target is a creature, it must succeed on a DC 17 Strength saving throw or be knocked prone.

Weird Eye (Recharge 5–6). The bicornaclops magically forces a creature it can see within 60 feet of it to make a DC 15 Charisma saving throw, becoming charmed by the bicornaclops on a failed save, as the creature becomes transfixed on the bicorniclops' weird eye. The charm lasts up to 1 minute, or until the bicornaclops' concentration ends (as if concentrating on a spell).
A charmed creature is incapacitated, can't concentrate, immediately ending any concentration it was currently maintaining, and it can't willingly move further from the bicornaclops or out of line of sight to it. A charmed creature also can't willingly stop itself from staring at the bicornaclops, rendering the creature effectively blind to all other targets. The creature can repeat its save each time it ends its turn unable to see the bicornaclops, succeeding automatically if it hasn't seen the bicornaclops since the start of its previous turn.