Agate Dragon, Ancient

Family: Dragons

Gargantuan dragon, chaotic neutral

Armor Class 22 (natural armor)
Hit Points 444 (24d20 + 192)
Speed 40 ft., fly 80 ft.

STR	DEX	CON	INT	WIS	CHA
29 (+9)	10 (+0)	27 (+8)	20 (+5)	17 (+3)	21 (+5)

Saving Throws Dex +7, Con +15, Wis +10, Cha +12
Skills Deception +12, Nature +12, Perception +17, Stealth +7, Survival +10
Damage Immunities psychic
Senses blindsight 60 ft., darkvision 120 ft., passive Perception 27
Languages Common, Draconic
Challenge 22 (41,000 XP)

Special Traits

• Change Shape. As an action, 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.
• Legendary Resistance (3/Day). If the dragon fails a saving throw, it can choose to succeed instead.

Actions

• Multiattack. The dragon can use its Frightful Presence. It then makes three attacks: one with its bite and two with its claws.
• Bite. Melee Weapon Attack: +16 to hit, reach 15 ft., one target. Hit: 20 (2d10 + 9) piercing damage.
• Claw. Melee Weapon Attack: +16 to hit, reach 10 ft., one target. Hit: 16 (2d6 + 9) slashing damage.
• Tail. Melee Weapon Attack: +16 to hit, reach 20 ft., one target. Hit: 18 (2d8 + 9) bludgeoning damage.
• Frightful Presence. Each creature of the dragon’s choice that is within 120 feet of the dragon and aware of it must succeed on a DC 20 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.
• Breath Weapons (Recharge 5-6). The dragon uses one of the following breath weapons:
  • Psychic Breath. The dragon exhales a psychic blast of energy in a 120-foot line that is 10 feet wide. Each creature in that area must make a DC 23 Intelligence saving throw, taking 71 (13d10) psychic damage on a failed save, or half as much damage on a successful one.
  • Stunning Breath. The dragon exhales a blast of stunning energy in a 60-foot cone. Each creature in that area must make a DC 23 Intelligence saving throw or become stunned for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on a success.

Legendary Actions

The 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 dragon regains spent legendary actions at the start of its turn.

• Detect. The dragon makes a Wisdom (Perception) check.
• Tail Attack. The dragon makes a tail attack.
• Wing Attack (Costs 2 Actions). The dragon beats its wings. Each creature within 10 feet of the dragon must succeed on a DC 24 Dexterity saving throw or take 16 (2d6 + 9) bludgeoning damage and be knocked prone. The dragon can then fly up to half its flying speed.

About

As a dragon ages, its need (and desire) for sleep grows, and it is no different for the agate dragon, with ancient agate dragons becoming more sedentary than their younger kin.

Finding a cave to settle in, the dragon slowly begins to meld with the mountain, until they finally become, in a way, its soul. Their interventions in the dreams of others and their dominion over the lands they influence often causes them to be mistaken for local earth deities.

Every ancient agate dragon is unique. One may be a hermit that enjoys their solitude, another may be a wise one that seeks to pass on their knowledge and experience, and yet another may be an inveterate jester whose jokes know no limit. An ancient agate dragon’s attitude may even change from one century to another.

An Agate Dragon’s Lair

The dragon’s magic changes its environment to suit its shape and grant it an edge in its domain.

Regional Effects

The effects of an agate dragon’s presence are subtle enough to be mistaken for the presence of other supernatural creatures, such as a divinity or spirits:

• Breath Weapons (Recharge 4-6). When the dragon is in its lair, its breath weapons recharge on 4-6 instead of 5-6.
• Control Weather. Once a day, an agate dragon can cast the control weather spell on any point within its domain.
• Domain Vision. 3 times a day, an agate dragon can cast the scrying spell, requiring no material components, on any point within its domain. It can also make the sensor hover or move at a speed of 50 ft., and can cast spells from the sensor as if it were present itself.
• Haven. An agate dragon can cast the hunter’s haven spell with a 5th-level spell slot on any point within its domain, and open it to creatures of its choice.

Lair Actions

Inside its lair, the dragon can take a lair action on initiative count 20 (losing all initiative ties).

• Inhale. The dragon tries to catch its breath. Roll a d6. On a 6, it can use the Breath Weapons action again.
• Innate Spellcasting. The agate dragon’s innate spellcasting ability is Charisma (spell save DC 17 for an adult dragon, or 20 for an ancient dragon). The agate dragon can innately cast the following spells, requiring no material components:
• At will: magic mouth, minor illusion
• 3/day each: greater invisibility, silent walk
• 1/day each: dream, mirage arcane, programmed illusion
• Magic Resistance. Until its next lair action, the dragon has advantage on saving throws against spells and other magical effects.
• Movement. The dragon can move a number of feet equal to its speed.
• Sturdy Scales. Until its next lair action, the dragon has resistance to nonmagical bludgeoning, piercing and slashing damage.