Ancient Ruby Dragon

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

Amplification Aura. Allies’ spells cast within 30 feet have their saving throw DC increased by 4.

Multi-attack. The dragon makes three attacks: one with its bite and two with its claws.

Bite. Melee Weapon Attack: +13 to hit, reach 15 ft., one target. Hit: 17 (2d10 + 6) piercing damage.

Claw. Melee Weapon Attack: +13 to hit, reach 10 ft., one target. Hit: 13 (2d6 + 6) slashing damage.

Tail. Melee Weapon Attack: +13 to hit; reach 20 ft., one target. Hit: 15 (2d8 + 6) bludgeoning damage.

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.

Psionics. The dragon uses a psionic ability.

Psionic Shift (Costs 2 Actions). The dragon releases a wave of telekinetic energy from its mind. Every creature within 15 feet must make a DC 24 Intelligence saving throw or take 15 (2d6 + 8) force damage and be knocked prone. The dragon then can move up to half its movement speed

Psionics

Charges: 26 Recharge: 1d10 Fracture: 32

Each dragon begins with a number of charges based on their age. They can expend these charges to cast psionic manifestations. Many of these manifestations have a base cost and can be enhanced by expending
more charges. Over time, the dragon’s crystals conduct more psionic energies into its body, recharging its power. At the end of each of its turns, roll the recharge die and restore that many charges. Each dragon also has a fracture score. Each time it takes more damage than its Fracture score in a single turn, its crystalline form fractures, diminishing its ability to recharge its power. Roll the recharge die and reduce the dragon’s maximum charges by the result. This damage heals itself upon finishing a long rest.

AMPLIFY
Casting Time: 1 action Range: Self
Duration: 1 minute Charges: 4
The dragon focuses the power of its mind and wreaths its teeth, claws, and tail in glowing psionic force. For the next minute, all of its melee attacks deal an extra 3d8 psychic damage.

THE REAL
Casting Time: 1 action Range: Self
Duration: Concentration, up to 1 hour Charges: 4
The dragon sees the real reality. It can tell what is an illusion, and it sees invisible creatures and creatures
hidden or disguised by magic. Magical darkness does not affect it, and it can see into the Ethereal Plane.

FLAY
Casting Time: 1 bonus action Range: Self (60-foot cone)
Duration: 1 round Charges: 2 per d6 of damage
As a bonus action, the dragon blasts pure psionic energy from its eyes, frying the brains of all creatures in a 60-foot cone. Each creature in that area must make an Intelligence saving throw. On a failed save, it takes psychic damage of a d6 per 2 charges spent, or half as much damage on a successful one.