Chrysana, the Psionic Doomsayer

Special Equipment. Chrysana carries a Staff of Extreme Power and thirty +3 darts.

Necropsychotic Surge(1/day). For 1 minute, Chrysana pulsates with dark energy. Her melee attacks deal an extra 18(4d8) necrotic damage and 18(4d8) psychic damage. She also regenerates all her innate spellcasting abilities per turn, and can cast two of them in one action.

Innate Spellcasting(Psionics). Chrysana's spellcasting ability is Intelligence (spell save DC 21). She can innately cast the following spells, requiring no material components:

At will: telekinesis, detect magic, telepathy(120 ft range, 1 hour), levitate, speak with the dead, spare the dyng, gentle repose

5/day each: rary's telepathic bond(range 60 ft), danse macabre

3/day: circle of death, mental prison

1/day each: soul cage(the soul is trapped inside Chrysana's mind) finger of death , psychic scream

Legendary Resistance(3/day). If Chrysana fails a saving throw, she can choose to succeed instead.

Magic Resistance. Chrysana has advantage on saving throws against all magical efffects

Negative Energy Aura. A 60 ft aura extends from Chrysana, who can choose when to activate this aura or deactivate it. Any creature inside the aura while it is active dies when it is reduced to 0 hit points. If there is an ally nearby, a third of the creature's maximum hitpoints is transfered to it(or spread among many allies as Chrysana chooses).

Unconscious Power. Chrysana can still cast telepathy while unconscious or making death saves.

Undying(Recharges after a long rest). If Chrysana is reduced to 0 hit points, she automatically succeeds on one saving throw(she only needs to succeed on two). While making death saves. If she becomes stabilized, she regains consciousness and recovers 1 hit point. 

Multiattack. Chrysanamakes two attacks with her Staff of Extreme Power .

Staff of Extreme Power. Melee Weapon Attack: +13 to hit, reach 5 ft., one target. Hit: 7(1d6 + 4) bludgeoning damage or 8(1d8 + 4) if used with both hands plus 4(1d8) force damage. If Necropsychotic surge is active, Chrysana deals an extra 18(4d8) necrotic damage and 18(4d8) psychic damage with this attack.

+3 Dart. Ranged Weapon Attack: +17 to hit, range 20/60 ft., one target. Hit: 10 (1d4+8) piercing damage.

Instant Telekinetic Death(Recharge 6). Chrysana targets one creature she can see within 60 ft of her. The creature must make a DC 22 CON save or become ripped apart from Chrysana's telekinesis, effectively killing the creature. Legendary creatures instead take 10(3d6) psychic damage, 10(3d6) bludgeoning damage, and 10(3d6) necrotic damage(They die instantly if they are reduced to 0 hit points from this damage).

Telekinetic Wave(Recharge 5-6). Chrysana sends a telekinetc wave of energy at up to 10 creatures she can see within 60 ft of her. Each creature must succeed on a DC 21 STR save or be hurled 40 ft away from her. A save that failed by 3 or more causes the creature to fall prone as well. Regardless of the failed save outcome, if the creatures hit a wall or other obstacle, they take 11(2d10) bludgeoning damage per 10 ft thrown and fall prone.

Psychic Torment(Recharge 4-6). Chrysana targets one creature she can see within 60 ft of her. That creature must make a DC 24 CON save or suffer from psychic torment. That creature is considered to be paralyzed for up to 1 minute and takes 21(6d6) psychic damage. A successful save causes the creature to have disadvantage on all ability checks and saving throws for the next minute.

Chrysana 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. Chrysana regains spent legendary actions at the start of her turn.

Move. Chrysana moves up to half her speed.

Staff Attack(Costs 2 actions). Chrysana attacks with her Staff of Extreme Power.

Telekinesis(Costs 3 actions). Chrysana casts telekinesis.