Alysanne Fyndrael, The Lioness of Valoren

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

Fey Ancestry. Alysanne has advantage on saving throws against being Charmed and magic can't put her to sleep.

Action Surge (3/Short or Long rest). On her turn, Alysanne can take one additional action.

Second Wind (3/Short or Long rest). Alysanne can use a bonus action to regain 55(10d10) Hit Points.

Legendary Criticals. Alysanne scores a critical hit on a roll of 18-20. Whenever Alysanne scores a critical hit with a melee weapon attack, the attack deals maximum damage.

Inspirational Leader. All friendly creatures that can hear or see Alysanne scores a critical hit on weapon attack rolls on a  18-20. Additionally all friendly creatures within 30 ft. can add +6 to either their attack roll or damage roll whenever they make a weapon attack.

Bladesong (5/Short or Long rest). Alysanne can use a bonus action to start a Bladesong, which lasts for 1 minute. She gains a +7 bonus to her AC, her walking speed increases by 30 ft., she has advantage on Acrobatics checks, and she gains a +7 bonus to her concentration checks.

Reactive. On the first turn of combat when a creature other than Alysanne moves, she may use her reaction to move up to her speed. Also, she may use three reactions instead of one during an initiative round.

Fast as Lightning. Alysane can put herself under the effects of haste as a bonus action. This does not require concentration. Additionally, while Bladesinging, Alysanne can dash as a bonus action; when she dashes in this way she does not trigger opportunity attacks.

Spell Mastery. Alysanne can cast the following spells at will.

at will: shield, mind thrust

Spellcasting. Alyssane is a 20th-level spellcaster. Her spellcasting ability is Intelligence (spell save DC 25, +17 to hit with spell attacks). Alysanne has the following wizard spells prepared:

Cantrips (at will): booming blade, green-flame blade, fire bolt, lightning lure, mind sliver

1st level (4 slots): magic missile, absorb elements, false life

2nd level (3 slots): hold person, detect thoughts, blur, shadow blade, mind thrust

3rd level (3 slots): counterspell, slow, thunder step

4th level (3 slots): fire shield, wall of fire, lightning dance (web of fire, lightning damage)

5th level (3 slots): steel wind strike, wall of force

6th level (2 slots): tensers transformation, chain lightning, disintegrate, investiture of wind

7th level (2 slots): crown of stars, finger of death, simulacrum

8th level (1 slots): dominate monster, maddening darkness, sunburst, control weather

9th level (1 slots): invulnerability, foresight

Multiattack. Alysanne makes four attacks.

Lightning's Edge. Melee Weapon Attack: +17 to hit, reach 5 ft., one target. Hit: 8 (1d8 + 11) piercing damage plus 14 (4d6) lightning damage. While Bladesinging, the attack deals 20 (1d8 + 18) piercing damage plus 21 (6d6) lightning damage.

Thunder Clap (Recharge 5-6). Alysanne releases a torrent of lightning from her blade in a 120-­foot line that is 10 ft. wide. Each creature in that line must make a DC 23 Dexterity saving throw, taking 88 (16d10) lightning damage on a failed save, or half as much damage on a successful one. All creatures within 30 ft. of that line must make a DC 23 Constitution saving throw or take 44 (8d10) thunder damage and be deafened until the end of their next turn, if they suceed they instead take half damage and are not deafened.

 Lady Lightning (1/Long Rest) *Must be Bladesinging. Alysanne becomes the embodiment of lightning and dashes forward like a bolt of lightning to attack her target. Alysanne can move up to her remaining movement and make a spell attack against a single creature. On a hit the Alysanne deals 220 (40d10) lightning damage and all creatures within 5 ft. must suceed on a DC 23 Contitution saving throw or take 27 (5d10) thunder damage and be deafened until the end of their next turn.

Song of Defense. When Alysanne takes damage while her Bladesong is active, she can use her reaction to expend one spell slot and reduce that damage to her by an amount equal to five times the spell slot’s level.

Alysanne can take 5 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. Alysanne regains spent legendary actions at the start of her turn.

Thunder Clap (costs 2 actions). Alysanne uses her Thunder Clap action.

Electric Slide (costs 2 actions). Alysanne moves up to twice her speed in a straight line without provoking attacks of opportunity. She can make a single attack against any creature within 5 ft. of her path.

Spell. Alysanne casts a spell of 6th level or lower.

Flash Step. Alysanne moves up to her speed without provoking attacks of opportunity. She can fly or run across water with this movement as long as she is moving in a straight line.