Ancient Bronze Dragon

The dragon can breathe air and water.

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

The dragon makes three Rend attacks. It can replace one attack with a use of Repulsion Breath or Spellcasting to cast Guiding Bolt (level 2 version).

Melee Weapon Attack: +16 to hit, reach 15 ft., one target. Hit: 19 (2d8 + 9) slashing damage plus 9 (2d8) lightning damage.

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.

Dexterity Saving Throw: DC 23, each creature in a 120-foot-long, 10-foot-wide Line. Failure: 75 (15d10) lightning damage. Success: Half damage.

The dragon casts one of the following spells, requiring no Material components and using Charisma as the spellcasting ability (spell save DC 23, +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.