Ancient Brass Dragon

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

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

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Dexterity Saving Throw: DC , each in a -foot-long, -foot-wide Line.
Failure: damage.
Success: Half damage.

Constitution Saving Throw: DC , each in a -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 minute. 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 monster casts one of the following spells, requiring no Material components and using Charisma as the spellcasting ability (spell save DC ):
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