Actions

Multiattack. The pit fiend makes 3 attacks: one with its bite, one with its claymore, and one with its tail. Bite. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: (3d6 + 5) piercing damage. The target must succeed on a DC 18 Constitution saving throw or become poisoned. While poisoned in this way, the target can’t regain hit points, and it takes 10 (3d6) poison damage at the start of each of its turns. The poisoned target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success Mace. Melee Weapon Attack: +9 to hit, reach 10 ft., one target. Hit: (2d6 + 5) bludgeoning damage plus (3d6) fire damage. Tail. Melee Weapon Attack: +9 to hit, reach 10 ft., one target. Hit: (2d10 + 5) bludgeoning damage.   Point of Terror (bonus action). Ranged 25 ft.; the target makes a saving throw and takes a –3 penalty to all defenses until the end of the pit fiend’s next turn on a failed save, on a success, nothing happens.   Tactical Teleport (Recharge 4-6). The pit fi end can teleport up to 2 allies within 50 ft of it. The targets appear in any other unoccupied space within 50 ft. of the pit fiend.   Irresistable Command (bonus action). Ranged 50 ft.; targets one allied devil of a lower level than the pit fi end; the target slides 5 squares and explodes, dealing 2d10 + 5 fire damage to all creatures in a radius of 10 ft. The exploding devil is destroyed.

Reactions

Responsive Strike. If someone strikes the Pit Fiend, it can make one attack as a reaction.

Legendary Actions

The pit fiend can take 2 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. The pit fiend regains spent legendary actions at the start of its turn. Scornful Singe. The pit fiend exudes an immense amount of heat from his body, all of those within a 15 ft. radius of him must make a dexterity saving throw, or take 10 (3d6) fire damage.   Scorching Ray. The pit fiend can make a scorching ray spell attack. Wing Attack (Costs 2 actions). The pit fiend beats its wings. Each creature within 5 feet of the dragon must succeed on a DC 17 Dexterity saving throw or take 10 (3d6) bludgeoning damage and be knocked prone. The dragon can then fly up to half its flying speed.