The Ancient Sovereign Dragon is a Level 20 creature, with Armor Class 46 and 410 hit points. A majestic arbiter of destiny that utilizes psychic roars and brilliant radiance to subjugate its foes.
Rare, Neutral, Gargantuan, Dragon, Earth. Frightful Presence (aura, emotion, fear, mental) 90 feet, DC 41. Mentalist Counterspell (abjuration, occult) Trigger: The dragon is targeted by a mental effect it's aware of. The dragon immediately attempts to counteract the triggering effect (counteract modifier +32). Violent Retort Trigger: A creature within the sovereign dragon's reach critically hits the dragon. The sovereign dragon makes a claw or tail Strike against the creature, after applying all the effects of the critical hit to the dragon. Breath Weapon (evocation, mental, occult) The dragon unleashes a roar charged with psychic energy, dealing 21d6 mental damage in a 50-foot cone (DC 43 basic Will save). The dragon can't use Breath Weapon again for 1d4 rounds. Coiling Frenzy: The dragon makes one claw Strike and one tail Strike in either order, each against the same target. If either Strike hits, the dragon automatically Grabs the target. Draconic Momentum: The dragon recharges their Breath Weapon whenever they score a critical hit with a Strike. Gleaming Armor (evocation, light, occult) The dragon's golden armor glows with a protective golden light. The dragon gains a +2 status bonus to AC and resistance 20 to energy damage. Each enemy in a 20-foot emanation must succeed at a DC 43 Fortitude save or be dazzled. All these effects last until the end of the dragon's next turn. Greater Constrict: 4d8+11 bludgeoning, DC 43. Inspire Envoy (enchantment, mental, occult): The dragon chooses a mortal they've observed performing an exceptional act and offers their august blessing in exchange for the creature carrying out a specific directive. If the creature agrees, until its next daily preparations, it gains a +2 status bonus to the dragon's choice of attack rolls, AC, or all of the following: Perception, Will saves, and Charisma-based skill checks. The dragon can Dismiss this benefit.
410 hit points.
Level 20.
AC 46.
Speed 60 ft., fly 180 ft.
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Official stats from the Pathfinder 2e (Second Edition) System Reference Document (SRD), free to use under the ORC open license.