Adult Brass Dragon

3/day (4/day in lair). If the adult brass dragon fails a saving throw, it can choose to succeed instead.

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

Melee Weapon Attack: +11 to hit, reach 5 ft.. Hit: 17 (2d10 + 6) slashing plus 4 (1d8) fire damage.

Recharge 5–6. Dexterity Saving Throw: DC 18, each creature in a 60-foot-long, 5-foot-wide Line.
Failure: 45 (10d8) fire damage.
Success: Half damage.

Constitution Saving Throw: DC 18, each creature in a 60-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.

1 use per day. The adult brass dragon casts one of the following spells, requiring no Material components and using Charisma as the spellcasting ability (spell save DC 16):
At Will: Detect Magic, Minor Illusion, Scorching Ray, 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: Detect Thoughts, Control Weather

The adult brass dragon uses Spellcasting to cast Scorching Ray.

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

Dexterity Saving Throw: DC 16, 1 creature the adult brass dragon can see within 120 feet.
Failure: 27 (6d8) fire damage, and the target's Speed is halved until the end of its next turn.
Failure or Success: The adult brass dragon can't take this action again until the start of its next turn.