College of Shadow Dancer

Shadow Dancer are a special group of people that are trained in a way of Sword Dancer by the church of Eilistraee, so they naturally ally them self with the church of Eilistraee. Except some who choose to betray  the church of Eilistraee.

The Shadow Dancers shared the same allegiances and enemies of the church of Eilistraee. They were the product of the priestesses' effort to establish good relationships with surface dwellers and to live in peace with them. 

The Shadow Dancers were in direct opposition with the church of Lolth as the Sword Dancers are, due to joyless and cruel life that their tyranny forced upon the drow. Followers of Vhaeraun, Ghaunadaur and Kiaransalee also counted among the Sword Dancers' enemies.

The Sword Dancers were skilled sword wielders, known to use their art while fencing. They fought employing an agile and acrobatic style, that allowed them to quickly and gracefully move on the battlefield, with movements that resembled a dance.

Sword Dance

You can invoke a Drow magic called the Sword Dance, 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 Sword Dance, 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 Sword Dance at any time (no action required).

While your Sword Dance is active, you gain the following benefits:

You gain a bonus to your AC equal to your Charisma modifier (minimum of +1).
Your walking speed increases by 10 feet.
You have advantage on Dexterity (Acrobatics) checks.
You gain a bonus to any Constitution saving throw you make to maintain your concentration on a spell. The bonus equals your Charisma modifier (minimum of +1)

You can use this feature a number of times equal to your proficiency bonus, and you regain all expended uses of it when you finish a long rest.

Spellsong

Also at 3rd level, you learn to use spellsong given by Eilistraee  you can use your Bardic Inspiration die to hurt your enemy by imbuing it to your attack. When you choose to do attack action, you can spend one of your Bardic Inspiration die to give extra magical damage to your attack.

Eilistraee's blessing

Starting at lv 3, you gain the blessing of Eilistraee as you ally your self with the church of Eilistraee, Whenever you gain a bard level, you can replace one spell you gained with another spell of the same level. The new spell must be an abjuration or a Evocation spell from the sorcerer or warlock spell list.

You lost this feature if you betray the church of Eilistraee.

Extra Attack

Starting at 6th level, You can attack twice, instead of once, whenever you take the Attack action on your turn. Moreover, you can cast one of your cantrips in place of one of those attacks.

Spellsong of Victory

At 14th level, You can add your Charisma modifier (minimum of +1) to the damage of your melee weapon attacks while your Sword Dance is active.