Croterion the Copper Dragon

Legendary Resistance (3/Day) If Croterion fails a saving throw, he can choose to succeed instead.

Multiattack. Croterion can use his Frightful Presence. He then makes three attacks: one with his bite or tail, two with his claws.

Bite. Melee Weapon Attack: +11 to hit, reach 10 ft., one target. Hit: 3d10 + 8 piercing damage.

Claw. Melee Weapon Attack: +11 to hit, reach 5 ft., one target. Hit: 3d6 + 8 slashing damage.

Tail. Melee Weapon Attack: +11 to hit, reach 15 ft., one target. Hit: 3d8 + 8 bludgeoning damage.

Frightful Presence. Each creature of Croterion's choice that is within 120 feet of him and aware of him must succeed on a DC 22 Wisdom saving throw or become frightened for 1 minute. 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 or the effect ends for it, the creature is immune to Croterion's frightful presense for the next 24 hours.

Breath Weapons (Recharge 5–6). Croterion uses one of the following breath weapons.

Acid Breath. Croterion exhales acid in an 60-foot line that is 5 feet wide. Each creature in that line must make a DC 22 Dexterity saving throw taking 10d8 acid damage on a failed save or half as much damage on a successful one.

Slowing Breath. Croterion exhales a sapping gas in a 30-foot cone. Each creature in that area must succeed on a DC 22 Constitution saving throw. On a failed save the creature can't use reactions, its speed is halved, and it can make only one attack on its turn. In addition, the creature can use either an action or a bonus action on its turn, but not both. These effects last for 1 minute. The creature can repeat the saving throw at the end of each of its turns, ending the effect on itself with a successful save.

Croterion 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. Croterion regains spent legendary actions at the start of his turn.

Detect. Croterion makes a Wisdom Perception check.

Tail Attack. Croterion makes a tail attack.

Wing Attack (Costs 2 Actions). Croterion beats his wings. Each creature within 20 feet of him must succeed on a DC 22 Dexterity saving throw or take 3d6 + 8 bludgeoning damage and be knocked prone. He can then fly up to half his flying speed.