Bladesinger

Mantle of Spell Resistance. The Bladesinger has advantage on saving throws to resist spells and spell-like effects.

Anklets of the Skirmisher.  The Bladesinger's movement does not provoke attacks of opportunity.

Warcaster. The Bladesinger has advantage on Constitution saving throws to maintain concentration on a spell.

Bladesong (3/day). The Bladesinger enters into an ancient dance of spell and sword. It lasts for 1 minute and takes a bonus action to activate.

• AC increases by +3
• Walking speed increases by 10 ft.
• Advantage on Dexterity (Acrobatics) checks.
• +3 bonus to Constitution saving throws to maintain concentration.

Fey Ancestry. The Bladesinger has advantage on saving throws against being charmed, and magic cannot put it to sleep.

Bloodmark of the Magi. The Bladesinger can focus on up to 3 concentration spells at once. If a concentration spell ends while the Bladesinger is concentrating on more than one spell, they gain a point of exhaustion that is removed after a short rest.

Familiar. The Bladesinger has a crow familiar.

Spellcasting. The Bladesinger is a 9th-level spellcaster. Its spellcasting ability is Intelligence (spell save DC 15, +7 to hit with spell attacks). A spell with * by its name is a concentration spell. The Bladesinger has the following wizard spells prepared:

Cantrips (at will): green-flame blade, lightning lure, light, prestidigitation

1st level (4 slots): find familiar, shield, jump, thunderwave

2nd level (3 slots): blur*, misty step

3rd level (3 slots): counterspell, haste*, slow*

4th level (3 slots): stoneskin*, polymorph*

5th level (1 slot): steel wind strike

Multiattack. The Bladesinger can make two melee attacks, and can replace one of them with a cantrip. 

Moonblade of Mayari +1. Melee Weapon Attack: +8 to hit, reach 5 ft. Hit: 11 (1d8+1d6+4) slashing damage. The moonblade sheds 10 ft. of bright light and 10 ft. of dim light beyond that. 

Dagger. Melee or Ranged Weapon Attack: +5 to hit, reach 5 ft. or range 20/60 ft., one target. Hit: 4 (1d4 + 2) piercing damage.

Green-Flame Blade. Melee Weapon Attack: +8 to hit, reach 5 ft., Hit: 16 (1d8+1d6+4) slashing damage and 1d8 fire damage. A creature within 5 ft. of the target can be dealt 7 (1d8+3) fire damage.

Lightning Lure. Force a DC 15 Strength saving throw on a creature within 15 ft. of the Bladesinger. On a failure, it is pulled 10 ft. towards the Bladesinger, and takes 9 (2d8) lightning damage if it ends within 5 ft. of the Bladesinger.

Shield. The Bladesinger gains +5 to AC until the start of their next turn, and take no damage from Magic Missile.

Counterspell. The Bladesinger cancels a 3rd level or lower spell that another creature casts. If the spell is higher than 3rd level, the Bladesinger makes an Intelligence check with a DC equal to 10 + the spell's level. If the Bladesinger succeeds, the spell is cancelled.

Warcaster. The Bladesinger can cast a spell or cantrip if it takes an attack of opportunity.