Adult Brass Dragon

Huge dragon, chaotic good

Armor Class 18 (natural armor)

Hit Points 172 (15d12+75)

Speed 40ft., burrow 30ft., fly 80ft.

Saving Throws Dex +5, Con +10, Wis +6, Cha +8

Skills History +7, Perception +11, Persuasion +8, Stealth +5

Damage Immunities fire

Senses blindsight 60ft., darkvision 120ft., passive Perception 21

Languages Common, Draconic

Challenge 13 (10,000 XP)

Traits

Legendary Resistance (3/Day)

If the dragon fails a saving throw, it can choose to succeed instead.

Actions

Multiattack

The dragon can use its Frightful Presence. It then makes three attacks: one with its bite and two with its claws.

Bite

Melee Weapon Attack: +11 to hit, reach 10ft., one target.
Hit: 17 (2d10+6) piercing damage.

Claw

Melee Weapon Attack: +11 to hit, reach 5ft., one target.
Hit: 13 (2d6+6) slashing damage.

Tail

Melee Weapon Attack: +11 to hit, reach 15ft., one target.
Hit: 15 (2d8+6) bludgeoning damage.

Frightful Presence

Each creature of the dragon's choice that is within 120ft of the dragon and aware of it must succeed on a DC 16 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 the dragon's Frightful Presence for the next 24 hours.

Breath Weapons (Recharge 5-6)

The dragon uses one of the following breath weapons.

Fire Breath. The dragon exhales fire in an 60ft line that is 5ft wide. Each creature in that line must make a DC 18 Dexterity saving throw, taking 45 (13d6) fire damage on a failed save, or half as much damage on a successful one.

Sleep Breath. The dragon exhales sleep gas in a 60ft cone. Each creature in that area must succeed on a DC 18 Constitution saving throw or fall unconscious for 10 minutes. This effect ends for a creature if the creature takes damage or someone uses an action to wake it.

Legendary Actions

The dragon can take 3 legendary actions, choosing from the options below. Only 1 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.

Detect. The dragon makes a Wisdom (Perception) check.

Tail Attack. The dragon makes a tail attack.

Wing Attack (Costs 2 Actions). The dragon beats its wings. Each creature within 10ft of the dragon must succeed on a DC 19 Dexterity saving throw or take 13 (2d6+6) bludgeoning damage and be knocked prone. The dragon can then fly up to half its flying speed.