Gargantuan dragon, Chaotic Good
| Armor Class | 21 (natural armor) |
|---|---|
| Hit Points | 350 (20d20 + 140) |
| Speed | 40 ft., climb 40 ft., fly 80 ft. |
| STR | DEX | CON | INT | WIS | CHA |
|---|---|---|---|---|---|
| 27 (+8) | 12 (+1) | 25 (+7) | 20 (+5) | 17 (+3) | 19 (+4) |
| Saving Throws | Cha +11, Con +14, Dex +8, Wis +10 |
|---|---|
| Skills | Deception +11, Perception +17, Stealth +8 |
| Damage Vulnerabilities | — |
| Damage Resistances | — |
| Damage Immunities | acid |
| Condition Immunities | — |
| Senses | blindsight 60 ft., darkvision 120 ft., passive Perception 27 |
| Languages | Common, Draconic |
| Challenge | 21 |
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: +15 to hit, reach 15 ft., one target. Hit: 19 (2d10 + 8) piercing damage.
Melee Attack Roll: +15 to hit, reach 10 ft., one target. Hit: 15 (2d6 + 8) slashing damage.
Melee Attack Roll: +15 to hit, reach 20 ft., one target. Hit: 17 (2d8 + 8) 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 19 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.
Acid Breath The dragon exhales acid in a 90-foot line that is 10 feet wide. Each creature in that line must make a DC 22 Dexterity saving throw, taking 63 (14d8) acid damage on a failed save, or half as much damage on a successful one.
Slowing Breath The dragon exhales gas in a 90-foot cone. Each creature in that area must succeed on a DC 22 Constitution saving throw. On a failed save, the creature can't use reactions, its speed is halved, and it can't make more than one attack on its turn. In addition, the creature can use either an action or a bonus action on its turn, but not both. These effects last for 1 minute. The creature can repeat the saving throw at the end of each of its turns, ending the effect on itself with a successful save.
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 23 Dexterity saving throw or take 15 (2d6 + 8) bludgeoning damage and be knocked prone. The dragon can then fly up to half its flying speed.
Gargantuan dragon (metallic), Chaotic Good
| Armor Class | 21 |
|---|---|
| Hit Points | 367 (21d20 + 147) |
| Speed | 40 ft., climb 40 ft., fly 80 ft. |
| STR | DEX | CON | INT | WIS | CHA |
|---|---|---|---|---|---|
| 27 (+8) | 12 (+1) | 25 (+7) | 20 (+5) | 17 (+3) | 22 (+6) |
| Saving Throws | Dex +8, Wis +10 |
|---|---|
| Skills | Deception +13, Perception +17, Stealth +8 |
| Damage Vulnerabilities | — |
| Damage Resistances | — |
| Damage Immunities | acid |
| Condition Immunities | — |
| Senses | Blindsight 60 ft., Darkvision 120 ft., passive Perception 27 |
| Languages | Common, Draconic |
| Challenge | 21 |
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) Slowing Breath or (B) Spellcasting to cast Mind Spike (level 5 version).
Melee Attack Roll: +15, reach 15 ft. Hit: 19 (2d10 + 8) Slashing damage plus 9 (2d8) Acid damage.
dex DC 22, each creature in an 90-foot-long, 10-foot-wide Line [Area of Effect]. Failure: 63 (14d8) Acid damage. Success: Half damage.
con DC 22, each creature in a 90-foot Cone [Area of Effect]. Failure: The target can't take Reactions; its Speed is halved; and it can take either an action or a Bonus Action on its turn, not both. This effect lasts until the end of its next turn.
cha DC 21, one creature the dragon can see within 120 feet. Failure: 31 (9d6) Psychic damage. Until the end of its next turn, the target rolls 1d8 whenever it makes an ability check or attack roll and subtracts the number rolled from the D20 Test. Success or Failure: The dragon can't take this action again until the start of its next turn.
The dragon uses Spellcasting to cast Mind Spike (level 5 version). The dragon can't take this action again until the start of its next turn.
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 21):
At will: Detect Magic, Mind Spike (level 5 version), Minor Illusion, 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: Greater Restoration, Major Image, Project Image