Ancient Bronze Dragon

+7

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

The dragon can breathe air and water.

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) Repulsion Breath or (B) Spellcasting to cast Guiding Bolt (level 2 version).

Melee Attack Roll: +16, reach 15 ft. Hit: 18 (2d8 + 9) Slashing damage plus 9 (2d8) Lightning damage.

Dexterity Saving Throw: DC 23, each creature in a 120-foot-long, 10-foot-wide Line. Failure: 82 (15d10) Lightning damage. Success: Half damage.

D5

Strength Saving Throw: DC 23, each creature in a 30-foot Cone. Failure: The target is pushed up to 60 feet straight away from the dragon and has the Prone condition.

The dragon casts one of the following spells, requiring no Material components and using Charisma as the spellcasting ability (spell save DC 22, +14 to hit with spell attacks):

• At will: Detect Magic, Guiding Bolt (level 2 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, Thaumaturgy
• 1/day each: Detect Thoughts, Control Water, Scrying, Water Breathing

The Ancient Bronze 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 Bronze Dragon regains spent legendary actions at the start of its turn.

3/TURN

The dragon uses Spellcasting to cast Guiding Bolt (level 2 version).

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

Constitution Saving Throw: DC 22, each creature in a 20-foot-radius Sphere centered on a point the dragon can see within 120 feet. Failure: 13 (3d8) Thunder damage, and the target has the Deafened condition until the end of its next turn.

Bronze dragons usually make their homes near or under the sea. The region containing an adult or ancient bronze dragon's lair is changed by its presence, creating the following effects:

Buoying Currents: Creatures within 1 mile of the lair that lack a Swim Speed ignore the extra cost of movement while swimming.

Sun and Storms: While in its lair, the dragon can cast Contr ol Weather, requiring no Material components and using the same spellcasting ability as its Spellcasting action. When casting the spell this way, the dragon can control the weather within 1 mile of its lair, regardless if the dragon is inside or outside.

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