Wizard: Bladesinger

Original Source: Tasha's Cauldron of Everything

Bladesong

^{2nd-level Bladesinging feature}
You can invoke an elven magic called the Bladesong, provided that you aren't wearing medium or heavy armor or using a shield. It graces you with supernatural speed, agility, and focus.

You can use a bonus action to start the Bladesong, which lasts for 1 minute. It ends early if you are incapacitated, if you don medium or heavy armor or a shield, or if you use two hands to make an attack with a weapon. You can also dismiss the Bladesong at any time (no action required).

While your Bladesong is active, you gain the following benefits:

Agility. You gain a bonus to your AC equal to your Intelligence modifier (minimum of +1)
Bladework. Whenever you attack with a weapon with which you have proficiency, you can use your Intelligence modifier for the attack and damage rolls instead of using Strength or Dexterity.
Focus. When you make a Constitution saving throw to maintain Concentration, you can add your Intelligence modifier to the total.

Additionally, choose one of the following options. This represents your Style, which grants you additional benefits while your Bladesong is active:

Bird. You can take the Disengage action when you take the Attack action, and you have advantage on Dexterity (Precision) checks.
Cat. Your walking speed increases by 10 feet, and you have advantage on Dexterity (Athletics) checks.
Snake. Your reach increases by 5 feet, and you have advantage on Dexterity (Stealth) checks.

You can use this feature a number of times equal to your Intelligence modifier (minimum once), and you regain all expended uses of it when you finish a long rest.

Training in War and Song

^{2nd-level Bladesinging feature}
You gain proficiency with light armor and all Melee Martial weapons that don’t have the Two-Handed or Heavy property. You can use a Melee weapon with which you have proficiency as a Spellcasting Focus for your Wizard spells.

You also gain proficiency in one of the following skills of your choice: Athletics, Convince, Precision, or Stealth.

Extra Attack

^{6th-level Bladesinging feature}
As in Tasha's Cauldron of Everything

Song of Defense

^{10th-level Bladesinging feature}
When you take damage while your Bladesong is active, you can take a Reaction to spend mana and reduce the damage taken by an amount equal to five times the amount of mana spent. Then, you perform the following action based on your chosen Style of Bladesong.

Bird. You can move up a number of feet equal to your speed plus the damage you reduced without provoking Opportunity Attacks. You may treat your speed as a flying speed during this movement, but you fall immediately after if you are not on the ground.
Cat. You gain resistance to all damage until the start of your next turn. If this effect reduces damage a number of times equal to the mana you spent on Song of Defense, it ends early.
Snake. You magically teleport a number of feet equal to the damage you reduced and become invisible the end of your next turn. It ends early if you attack or cast a spell.

Arcane Momentum

^{14th-level Bladesinging feature}
You have learned to chain your blade and spellwork into an arcane crecendo during battle. When you cast a spell of 1st-level or higher while Bladesong is active, you build Momentum equal to the spell's level. You also build Momentum equal to the mana spent when using Song of Defense. You can hold Momentum equal to your Wizard level. You lose 1 Momentum if you end your turn without moving or when you are knocked prone, half of your Momentum if your movement speed is reduced to 0, and all of your Momentum when your Bladesong ends.

You can spend Momentum to perform the following Songs, so long you meet the prerequisite:

Song of Celerity. When you move, you can spend 1 Momentum to take the Tumble action as a part of the movement. When you do, you can spend an additional 2 Momentum to double your movement until the start of your next turn.
Song of Fury. When you hit a creature with a weapon attack, you can spend any amount of Momentum to deal an extra 1d4 force damage on the attack for each Momentum spent.
Song of Supremacy. When you make an ability check as a part of casting a spell, you can spend 3 Momentum to reroll the ability check and take the new result.
Song of Victory. When you score a critical hit, or when a creature within 30 feet of you is reduced to 0 hit points, you may spend 3 Momentum to regain your Reaction or Bonus Action.
Song of Agility. When you are forced to make a Dexterity saving throw, you can spend 2 Momentum to gain advantage on the save. If you spend an additional 3 momentum, you also gain the Evasion trait until the start of your next turn. Requires Cat style.
Song of Liberty. When you would gain the gain the Dazed, Grappled, Incapacitated, Paralyzed, or Prone conditions, you can spend 3 momentum to prevent it. When you would gain the Freezing, Restrained, Slowed, Stunned, or Petrified conditions, you can spend 5 momentum to prevent it. Requires Bird style.
Song of Obscurity. When you would lose the Invisible or Hidden conditions, you can spend 2 Momentum to maintain the condition until the start of your next turn, even if you are being observed, or until you perform another action that would end the condition on yourself. Requires Snake style.

Bladesong Mastery

^{21st-level Bladesinging feature}
You have mastered every style of Bladesong, both conventional and unconventional. You gain the following benefits:

You gain proficiency in all martial weapons.
Your Bladesong no longer ends early if you use two hands to make a weapon attack.
When you activate your Bladesong, choose Cat, Bird, or Snake. You gain the benefits of the chosen school for the duration of the Bladesong.
You regain all expended uses of Bladesong when you finish a short or long rest.

Choir of Swords

^{25th-level Bladesinging feature}
You gain the following Songs, which can be activated via your Arcane Momentum feature:

Song of Ferocity. When you hit a creature with an attack, you can spend up to 6 Momentum, reducing the critical range of the attack by 1 for every 3 Momentum spent. This cannot bring your critical range beneath 18. Requires Cat style.
Song of Enmity. When a creature enters your reach, you can use your reaction to spend 3 Momentum to make a single weapon attack against them. You can spend 6 Momentum to cast a cantrip against them instead. Requires Snake style.
Song of Extremity. When you make an attack roll, you can spend 3 Momentum to gain advantage on the attack roll. On a hit, you flourish as if you had rolled a 20. If the attack roll flourishes, you can either flourish twice or gain 1 Momentum. Requires Bird style.

Extra Attack (2)

^{28th-level Bladesinging feature}
You can attack three times, instead of once, whenever you take the Attack action on your turn. Moreover, you can cast a spell in place of one of those attacks.