Adult Bronze Dragon
Huge dragon, lawful good
Armor Class 18 (natural armor)
Hit Points 212 (17d12 + 102)
Speed 40 ft., fly 80 ft., swim 40 ft., climb 20 ft.
str
25 (+7)
dex
10 (+0)
con
23 (+6)
int
16 (+3)
wis
15 (+2)
cha
20 (+5)
Saving Throws Dex +5, Wis +7
Skills Insight +7, Perception +12, Stealth +5
Damage Immunities lightning
Senses blindsight 60 ft., darkvision 120 ft., passive Perception 22
Languages Common, Draconic
Challenge 15 (13,000 XP)
Amphibious. The dragon can breathe air and water.
Legendary Resistance (3/Day, or 4/Day in Lair). If the dragon fails a saving throw, it can choose to succeed instead.
Actions
Lightning Breath. Dexterity Saving Throw: DC 19, each creature in a 90-foot-long, 5-foot-wide Line. Failure: 55 (10d10) Lightning damage. Success: Half damage.
Multiattack. 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).
Rend. Melee Attack Roll: +12, reach 10 ft. 16 (2d8 + 7) Slashing damage plus 5 (1d10) Lightning damage.
Repulsion Breath. Strength Saving Throw: DC 19, 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.
Spellcasting. The dragon casts one of the following spells, requiring no Material components and using Charisma as the spellcasting ability (spell save DC 17, +10 to hit with spell attacks): - **At Will:** Detect Magic, Guiding Bolt, Shapechange, Speak with Animals, Thaumaturgy - **1/Day Each:** Detect Thoughts, Water Breathing
Spellcasting (CHA, DC 17, +9 to hit)
At Will: Detect Magic, Guiding Bolt, Shapechange, Speak with Animals, Thaumaturgy
1/Day Each: Detect Thoughts, Water Breathing
Attack Summary
Legendary Actions
The adult bronze dragon can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. The adult bronze dragon regains spent legendary actions at the start of its turn.
Guiding Light. The dragon uses Spellcasting to cast Guiding Bolt (level 2 version).
Pounce. The dragon moves up to half its Speed, and it makes one Rend attack.
Thunderclap. Constitution Saving Throw: DC 17, each creature in a 20-foot-radius Sphere [Area of Effect]|XPHB|Sphere centered on a point the dragon can see within 90 feet. Failure: 10 (3d6) Thunder damage, and the target has the Deafened condition until the end of its next turn.