Sword Dancer

As priestesses of Eilistraee, the Sword Dancers acted according to her teachings. They had the duty to lead and be on the frontline in missions to find, encourage, assist and protect any drow looking to return to the surface (or that could be made to return) and join a different life, far from Lolth. They put a lot of effort into promoting harmony and cooperation between the drow and other races, and as a result they usually lived near elven (or other races) settlements. There they worked to aid the local population by bringing food, cures and protection, in order to establish friendships and offer to the drow converts a place on the surface world.

The Sword Dancers were artists, excellent dancers, fit acrobats and--like all priestesses of the Dark Maiden--skilled in the arts of singing and playing the harp, flute or horn. They were also known to nurture beauty, music and song and to work to spread joy whenever they could.

Restriction: Drow Only

Only drow, half-drow and some elves or half-elves that follow the teachings of Eilistraee can choose the Sword Dancer subclass. 

Bonus Proficiencies

When you become a Sword Dancer at 3rd level, you gain proficiency with Sword Dancer weapons. (swords and longbows)

Deft Deflection

At 3rd level, as a reaction you can expend a use of bardic inspiration to parry incoming blows against you or an ally within 5 feet. Roll the bardic inspiration die and add it the the target's AC for that attack. 

Blade Infusions

At 3rd level you can use a bonus action to infuse a weapon you are holding with a magical enhancement.
Moonglow: The blade you are holding is enhanced with the shimmering glow of moonlight. The glow casts bright light out to 15 feet and dim light to 30 feet. Once per turn the blade can grant advantage on a single weapon attack. Non hostile creatures within the light gain advantage on saving throws that inflict the frightened condition. The glow cannot be magically dispelled and lasts one minute.
Moonfire: The blade you are holding is infused with magic energy, surrounding the blade with blue-white flames, empowering the next strike within one minute. On a hit, the target suffers the attack's normal effects, and blue flames leap from the target to different creatures of your choice that you can see within 15 feet dealing damage equal to your spellcasting modifier. At 5th level, the melee attack deals an extra 1d8 fire damage to the target, and the fire damage to the nearby creatures increases to 1d8 + your spellcasting ability modifier. Both damage rolls increase by 1d8 at 11th level and 17th level. 
Lunar rhythm: The blade you are holding is enchanted to sing in a wordless harmony for one minute. Creatures that can hear the melody within 30 feet must succeed a wisdom saving throw against your save DC or become charmed by the wielder. Charmed creatures can roll a saving throw at the end of their turn. Creatures that save cannot be charmed again by this feature for 24 hours.
This feature can be used three times per long rest.
The number of uses increases by 1 at 5th level, 11th level and 17th level.

Dancing Sword

At 6th level, you can as a bonus action you can toss a sword you are wielding into the air to strike a target up to 30 feet away. The sword uses your attack roll and ability score modifier to damage rolls. While the sword hovers, as a bonus action you can command the sword to fly 30 feet to another spot within 30 feet of you and make a weapon attack. While the sword is within 5 feet of an ally, you can use your Deft Deflection to protect that ally. 

Entrancing Bladework

At 14th level, when you make a weapon attack against a charmed creature, you may add your bardic inspiration die to the weapon damage roll.