Awakened Gimlus(Sylrian the Petrifying)

Legendary Resistance (3/Day). If the dragon fails a saving throw, it can choose to succeed instead.

Psychic Rebound When struck by a melee attack, the attacker takes 2d8 psychic damage as fragments of prophetic visions flood their mind. Aura of Fate (10 ft.) Enemies that start their turn within 10 feet of Gimlus must succeed on a DC 19 Wisdom save or have disadvantage on the next attack roll or saving throw they make before the start of their next turn. The future briefly reveals itself—and they see failure.

Magic Resistance. Advantage on saves against spells and magical effects.

Dreamshield Mind. Immune to effects that alter memory, emotions, or force magical sleep.

Multiattack The Amethyst Dragon makes three attacks: one Bite and two Claws, —OR— two Claws and Astral Rupture.

Bite +13 to hit, reach 10 ft. 2d10 + 8 piercing + 2d8 psychic Foreseen Weakness On hit, the target must succeed on a DC 19 Wisdom save or have disadvantage on all opportunity attacks until the end of its next turn.

Claw +13 to hit, reach 5 ft. 2d6 + 8 slashing Thread Sever If both claws hit the same target on Gimlus's turn, the target takes an additional 3d6 force damage as Sylrian severs a thread of possibility.

Astral Rupture (Recharge 4–6) Gimlus tears open a fracture into the Astral Sea. A vortex of violet crystal and starlight erupts outward. 60-foot cone DC 20 Wisdom save 12d8 psychic + 4d8 force (Half on success) Lost in Possibility Creatures that fail the save cannot take reactions and have disadvantage on attack rolls until the end of their next turn

Amethyst Breath (Recharge 5–6) Gimlus exhales a beam of crystallized thought and astral energy. 90-foot line, 5 ft wide DC 20 Intelligence save 14d8 psychic + 4d8 force (Half on success) Shattered Certainty Creatures that fail the save have disadvantage on concentration checks and saving throws until the end of their next turn

LEGENDARY ACTIONS (3 per round)

Tail Sweep +13 to hit, reach 15 ft. 2d8 + 8 bludgeoning Target must make a DC 18 Dexterity save or be knocked prone. (In air: pushed 20 feet away instead.)

Psychic Pulse (Costs 2 Actions) A wave of amethyst energy erupts outward. Creatures within 20 feet must make a DC 19 Wisdom save or take: 4d6 psychic + 3d6 force and have disadvantage on the next attack roll they make.

Echoes of Tomorrow (Costs 2 Actions) Sylrian reveals a glimpse of a future that should not be. Creatures in a 30-foot cone must make a DC 19 Intelligence save or take: 3d10 psychic damage and become overwhelmed by prophetic visions. Affected creatures cannot take reactions until the start of their next turn.