Gargantuan dragon, Lawful Good
| Armor Class | 22 (natural armor) |
|---|---|
| Hit Points | 546 (28d20 + 252) |
| Speed | 40 ft., fly 80 ft., swim 40 ft. |
| STR | DEX | CON | INT | WIS | CHA |
|---|---|---|---|---|---|
| 30 (+10) | 14 (+2) | 29 (+9) | 18 (+4) | 17 (+3) | 28 (+9) |
| Saving Throws | Cha +16, Con +16, Dex +9, Wis +10 |
|---|---|
| Skills | Insight +10, Perception +17, Persuasion +16, Stealth +9 |
| Damage Vulnerabilities | — |
| Damage Resistances | — |
| Damage Immunities | fire |
| Condition Immunities | — |
| Senses | blindsight 60 ft., darkvision 120 ft., passive Perception 27 |
| Languages | Common, Draconic |
| Challenge | 24 |
The dragon can breathe air and water.
If the dragon fails a saving throw, it can choose to succeed instead.
The dragon can use its Frightful Presence. It then makes three attacks: one with its bite and two with its claws.
Melee Attack Roll: +17 to hit, reach 15 ft., one target. Hit: 21 (2d10 + 10) piercing damage.
Melee Attack Roll: +17 to hit, reach 10 ft., one target. Hit: 17 (2d6 + 10) slashing damage.
Melee Attack Roll: +17 to hit, reach 20 ft., one target. Hit: 19 (2d8 + 10) bludgeoning damage.
Each creature of the dragon's choice that is within 120 feet of the dragon and aware of it must succeed on a DC 24 Wisdom saving throw or become frightened for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a creature's saving throw is successful or the effect ends for it, the creature is immune to the dragon's Frightful Presence for the next 24 hours.
The dragon uses one of the following breath weapons.
Fire Breath The dragon exhales fire in a 90-foot cone. Each creature in that area must make a DC 24 Dexterity saving throw, taking 71 (13d10) fire damage on a failed save, or half as much damage on a successful one.
Weakening Breath The dragon exhales gas in a 90-foot cone. Each creature in that area must succeed on a DC 24 Strength saving throw or have disadvantage on Strength-based attack rolls, Strength checks, and Strength saving throws for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.
The dragon magically polymorphs into a humanoid or beast that has a challenge rating no higher than its own, or back into its true form. It reverts to its true form if it dies. Any equipment it is wearing or carrying is absorbed or borne by the new form (the dragon's choice).
In a new form, the dragon retains its alignment, hit points, Hit Dice, ability to speak, proficiencies, Legendary Resistance, lair actions, and Intelligence, Wisdom, and Charisma scores, as well as this action. Its statistics and capabilities are otherwise replaced by those of the new form, except any class features or legendary actions of that form.
The dragon makes a Wisdom (Perception) check.
The dragon makes a tail attack.
The dragon beats its wings. Each creature within 15 feet of the dragon must succeed on a DC 25 Dexterity saving throw or take 17 (2d6 + 10) bludgeoning damage and be knocked prone. The dragon can then fly up to half its flying speed.
Gargantuan dragon (metallic), Lawful Good
| Armor Class | 22 |
|---|---|
| Hit Points | 546 (28d20 + 252) |
| Speed | 40 ft., fly 80 ft., swim 40 ft. |
| STR | DEX | CON | INT | WIS | CHA |
|---|---|---|---|---|---|
| 30 (+10) | 14 (+2) | 29 (+9) | 18 (+4) | 17 (+3) | 28 (+9) |
| Saving Throws | Dex +9, Wis +10 |
|---|---|
| Skills | Insight +10, Perception +17, Persuasion +16, Stealth +9 |
| Damage Vulnerabilities | — |
| Damage Resistances | — |
| Damage Immunities | fire |
| Condition Immunities | — |
| Senses | Blindsight 60 ft., Darkvision 120 ft., passive Perception 27 |
| Languages | Common, Draconic |
| Challenge | 24 |
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 (A) Spellcasting to cast Guiding Bolt (level 4 version) or (B) Weakening Breath.
Melee Attack Roll: +17 to hit, reach 15 ft. Hit: 19 (2d8 + 10) Slashing damage plus 9 (2d8) Fire damage.
dex DC 24, each creature in a 90-foot Cone [Area of Effect]. Failure: 71 (13d10) Fire damage. Success: Half damage.
str DC 24, each creature that isn't currently affected by this breath in a 90-foot Cone [Area of Effect]. Failure: The target has Disadvantage on Strength-based D20 Test and subtracts 5 (1d10) from its damage rolls. It repeats the save at the end of each of its turns, ending the effect on itself on a success. After 1 minute, it succeeds automatically.
cha DC 24, one creature the dragon can see within 120 feet. Failure: 24 (7d6) Force damage, and the target has the Incapacitated condition and is transported to a harmless demiplane until the start of the dragon's next turn, at which point it reappears in an unoccupied space of the dragon's choice within 120 feet of the dragon. Success or Failure: The dragon can't take this action again until the start of its next turn.
The dragon uses Spellcasting to cast Guiding Bolt (level 4 version).
The dragon moves up to half its Speed, and it makes one Rend attack.
The dragon casts one of the following spells, requiring no Material components and using Charisma as the spellcasting ability (spell save DC 24, +16 to hit with spell attacks):
At will: Detect Magic, Guiding Bolt (level 4 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)
1 each/day: Flame Strike (level 6 version), Word of Recall, Zone of Truth