Bladesinger

Song of Victory. The bladesinger adds +5 to the damage of its melee weapon attacks while its Bladesong is active. (already included in the bladesingers actions)

Magic Resistance. The bladesinger has advantage on saving throws against spells and other magical effects.

Spellcasting. The bladesinger is an 18th-level spellcaster. Its spellcasting ability is Intelligence (spell save DC 18, +10 to hit with spell attacks). The bladesinger can cast shield and misty step at will and has the following wizard spells prepared:

Cantrips (at will): fire bolt, light, mage hand, prestidigitation, booming blade

1st level (4 slots): shield, silvery barbs, mage armor*, absorb elements

2nd level (3 slots): vortex warp, mirror image, misty step

3rd level (3 slots): counterspell, dispel magic, haste

4th level (3 slots): banishment, fire shield, greater invisibility

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

6th level (1 slot): globe of invulnerability, tenser's transformation

7th level (1 slot): teleport

8th level (1 slot): mind blank*

9th level (1 slot): time stop

*The bladesinger casts these spells on itself before combat.

Multiattack. The Bladesinger makes three Blade of Doom Attacks, one of which can be replaced by a Cantrip of its choice.

Blade of Doom. Melee Weapon Attack: +12 to hit, reach 5 ft., one target. Hit: 9 (1d8 + 10) piercing damage plus 14 (3d8) necrotic damage.

Bladesong (4/Day). The Bladesinger gains a +5 bonus to your AC, its walking speed increases by 10 ft., it has advantage on Acrobatics checks, and it gains a +5 bonus to any CON saving throw it makes to maintain its concentration on a spell.

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