Ancient Astral Dragon

Gargantuan dragon, neutral

Armor Class 22 (natural armor)

22 (natural armor) Hit Points 315 (18d20 + 126)

315 (18d20 + 126) Speed 40 ft., fly 120 ft.

STR DEX CON INT WIS CHA 25 (+7) 13 (+1) 25 (+7) 23 (+6) 24 (+7) 23 (+6)

Saving Throws Dex +8, Con +14, Wis +14, Cha +13

Dex +8, Con +14, Wis +14, Cha +13 Skills Acrobatics +8, Insight +14, Perception +21, Stealth +8

Acrobatics +8, Insight +14, Perception +21, Stealth +8 Senses blindsight 60 ft., darkvision 120 ft., passive Perception 31

blindsight 60 ft., darkvision 120 ft., passive Perception 31 Languages Common, Draconic

Common, Draconic Challenge 23 (50,000 XP)

Astral Familiarity. The dragon has advantage on ability checks made to navigate the Astral Plane.

Detect Extraplanar. The dragon is able to innately detect and locate any creature that is not native to the Astral Plane within 120 feet of the dragon. This feature only works on the Astral Plane.

Gravity Averse. The dragon is unaccustomed to planes that have a objective directional gravity. While outside the Astral Plane, its speed is halved and it has disadvantage on ability checks, attack rolls, and saving throws that use Strength, Dexterity, or Constitution.

Sever Silver Cord. If the dragon scores a critical hit against a creature traveling through the Astral Plane by means of the astral projection spell, the dragon can cut the target's silver cord instead of dealing damage.

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: +14 to hit, reach 10 ft., one target. Hit: 18 (2d10 + 7) piercing damage. Claw. Melee Weapon Attack: +14 to hit, reach 5 ft., one target. Hit: 14 (2d6 + 7) slashing damage. Tail. Melee Weapon Attack: +14 to hit, reach 15 ft., one target. Hit: 16 (2d8 + 7) 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 21 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.

Abrasive Breath. The dragon exhales blasts of wind and dust in an 90-foot cone. Each creature in the area must make a DC 22 Dexterity saving throw, taking 63 (18d6) slashing damage on a failed save, or half as much damage on a successful one.

Banishing Breath. The dragon attempts to force creatures back to their homeland in a 90-foot line that is 10 feet wide. Each creature in that area must succeed on a DC 22 Charisma saving throw or be affected as if by the banishment spell for 1 minute (no concentration required).