Ancient Brass Dragon

+6

Arcana: The monster's treasure hoard features magic items with the noted theme. The Dungeon Master's Guide details treasure hoards appropriate for each theme.

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

5/DAY

The dragon makes three Rend attacks. It can replace one attack with a use of (A) Sleep Breath or (B) Spellcasting to cast Scorching Ray (level 3 version).

Melee Attack Roll: +14, reach 15 ft. Hit: 19 (2d10 + 8) Slashing damage plus 7 (2d6) Fire damage.

Dexterity Saving Throw: DC 21, each creature in a 90-foot-long, 5-foot-wide Line. Failure: 58 (13d8) Fire damage. Success: Half damage.

D5

Constitution Saving Throw: DC 21, each creature in a 90-foot Cone. Failure: The target has the Incapacitated condition until the end of its next turn, at which point it repeats the save. Second Failure: The target has the Unconscious condition for 10 minutes. This effect ends for the target if it takes damage or a creature within 5 feet of it takes an action to wake it.

The dragon casts one of the following spells, requiring no Material components and using Charisma as the spellcasting ability (spell save DC 20):

• At will: Detect Magic, Minor Illusion, Scorching Ray (level 3 version), Shapechange (Beast or Humanoid form only, no Temporary Hit Points gained from the spell, and no Concentration or Temporary Hit Points required to maintain the spell), Speak with Animals
• 1/day each: Control Weather, Detect Thoughts

The Ancient Brass Dragon can take 3 legendary actions, choosing from the options below. Only one legendary action can be used at a time and only at the end of another creature's turn. The Ancient Brass Dragon regains spent legendary actions at the start of its turn.

3/TURN

The dragon uses Spellcasting to cast Scorching Ray (level 3 version).

The dragon moves up to half its Speed, and it makes one Rend attack.

Dexterity Saving Throw: DC 20, one creature the dragon can see within 120 feet. Failure: 36 (8d8) Fire damage, and the target's Speed is halved until the end of its next turn. Failure or Success: The dragon can't take this action again until the start of its next turn.

Brass dragons usually dwell in secret caves and canyons near well-traveled routes. The area containing an adult or ancient brass dragon's lair is altered by its presence, creating the following effects:

Mirages: While in its lair, the dragon can cast Major Image, requiring no Material components and using the same spellcasting ability as its Spellcasting action. When casting the spell this way, the spell's range is 1 mile, and the dragon doesn't need to see the spot where the illusion appears.

Refreshing Water: Water within 1 mile of the lair is magically refreshing. A creature that drinks such water gains 2d4 Temporary Hit Points, and the dragon is immediately aware of the creature's presence.

If the dragon dies or moves its lair elsewhere, these effects end immediately.