Ancient Brass Dragon

Traits

Legendary Resistance (4/Day, or 5/Day in Lair). If the dragon fails a saving throw, it can choose to succeed instead.

Actions

Multiattack. 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).

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

Fire Breath (Recharge 5+). dex 21, each creature in a 90-foot-long, 5-foot-wide Line. Failure: 58 (13d8) Fire damage. Success: Half damage.

Sleep Breath. con 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.

Legendary Actions

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

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

Scorching Sands. dex 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.