Barbed Devil Skeleton

Barbed Bones.  At the start of each of its turns, the barbed devil deals 5 (1d10) piercing damage to any creature grappling it, or 2 (1d4) piercing damage to any creature grappled by it.
Devil's Sight.  Magical darkness doesn't impede the devil's darkvision.
Magic Resistance.  The devil has advantage on saving throws against spells and other magical effects.

Multiattack.  The devil makes three melee attacks: one with its tail and two with its claws.  If both claw attacks hit the same target, the devil can attempt to grapple that target as a bonus action.  Alternatively, it can use Hurl Flame three times.
Claw.  Melee Weapon Attack: +7 to hit, reach 5 ft., one target.  Hit: 7 (1d6 + 4) piercing damage.
Tail.  Melee Weapon Attack: +7 to hit, reach 5 ft., one target.  Hit: 11 (2d6 + 4) piercing damage.
Hurl Flame.  Ranged Spell Attack: +3 to hit, range 150 ft., one target.  Hit: 10 (3d6) fire damage.  If the target is a flammable object that isn't being worn or carried, it also catches fire.