Ancient Red Dragon Skeleton

Legendary Resistance (3/Day). If the dragon fails a saving throw, it can choose to succeed instead.

Multiattack. The dragon can use its Frightful Presence. It then makes two attacks: two with its claws.

Bite. Melee weapon attack: +8 to hit, reach 10 f.t., one target Hit: 16(2d10+5) Piercing damage

Claw. Melee Weapon Attack: +8 to hit, reach 15 f.t., one target. Hit: 10(2d6+5) Slashing damage

Frightful Presence. Each creature that is within 120 feet of the dragon and aware of it must succeed on a DC 17 Wisdom saving throw or become frightened. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a creature’s saving throw is successful, the creature is immune to the dragon’s Frightful Presence for the next 24 hours.

The dragon can take 3 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 dragon regains spent legendary actions at the start of its turn.

Tail. Melee Weapon Attack: +8 to hit, reach 20 f.t., one target. Hit 14(2d8+5)