Devil's Sight.

Magical darkness doesn't impede the devil's darkvision.

Flyby.

The devil doesn't provoke an opportunity attack when it flies out of an enemy's reach.

Limited Spines.

The devil has twelve tail spines. Used spines regrow by the time the devil finishes a long rest.

Magic Resistance.

The devil has advantage on saving throws against spells and other magical effects.

Multiattack.

The devil makes two attacks: one with its bite and one with its fork or two with its tail spines.

Bite.

Melee Weapon Attack: +2 to hit, reach 5 ft., one target. Hit: 5 (2d4) slashing damage.

Fork.

Melee Weapon Attack: +2 to hit, reach 5 ft., one target. Hit: 3 (1d6) piercing damage.

Tail Spine.

Ranged Weapon Attack: +4 to hit, range 20/80 ft., one target. Hit: 4 (1d4 + 2) piercing damage plus 3 (1d6) fire damage.

Spined Devil