Multiattack

The devil attacks once with its beard and once with its glaive.

Beard

Melee Weapon Attack: +5 to hit, reach 5 ft., one creature. Hit: 7 (1d8 + 3) piercing damage and the target is poisoned until the end of the devils next turn. While poisoned in this way the target can't regain hit points.

Glaive

Melee Weapon Attack: +5 to hit, reach 10 ft., one target. Hit: 8 (1d10 + 3) slashing damage. If the target is a creature other than an undead or construct it makes a DC 12 Constitution saving throw. On a failure it receives an infernal wound and takes 5 (1d10) ongoing slashing damage. Each time the devil hits the wounded target with this attack the ongoing damage increases by 5 (1d10). A creature can spend an action to make a DC 12 Medicine check ending the ongoing damage on a success. At least 1 hit point of magical healing also ends the ongoing damage.