Gloomstalker

Large Monstrosity - Neutral Evil
Armor Class: 15 (Natural Armor)
Hit Points: 90 (12d10+24)
Speed: 40ft, fly 80ft
STR - 22, DEX - 16, CON - 14, WIS – 17, INT - 5, CHA - 14
Saving Throws: STR +9, DEX +6
Skills: Athletics +9, Intimidation +5, Perception +6, Stealth +6
Damage Vulnerabilities: Radiant
Senses: Darkvision 240ft, Passive Perception 16
Languages: Understands Common and Undercommon but can't speak
Challenge: 6
Traits
Shadowstep - As a bonus action, the gloomstalker can teleport up to 40 feet to an unoccupied space it can see.
Sunlight Sensitivity - While in sunlight, the gloomstalker has disadvantage on attack rolls, as well as on Wisdom (Perception) checks that rely on sight.
Actions
Multiattack - The gloomstalker makes two attacks: one with its bite and one with its claws.
Bite - Melee Weapon Attack: +9 to hit, reach 5 ft., one creature. Hit: 15 (2d8 + 6) piercing damage plus 7 (2d6) necrotic damage.
Claws - Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 13 (2d6 + 6) slashing damage plus 7 (2d6) necrotic damage.
Snatch - Melee Weapon Attack: +9 to hit, reach 5 ft., one Medium or smaller creature. Hit: 13 (2d6 + 6) slashing damage plus 7 (2d6) necrotic damage, and the target is grappled (escape DC: 17). While grappled in this way, the target is restrained.
Shriek - Recharge 6 - The gloomstalker emits a terrible shriek. Each enemy within 60 feet of the gloomstalker that can hear it must succeed on a DC: 13 Constitution saving throw or be paralyzed until the end of the enemy's next turn. Gloomstalkers are immune to this effect.