Prince of darkness

While others merely adopt the dark,you where born in it,molded by it.Darkness is what resonates with you.You hear the night calling to you,the only light source you want is the moon flying above you allowing people to see the elegant dance of death being performed at moments before the dawn comes and stops the show.As stated above you didn't choose the darkness.The shadows hugged you from birth.It was always like this.The beauty of the night has captivated your heart as you have become the very eminence of darkness

Midnight rush

You've learned to use the obscurity to your advantage.Starting at third level you have advantage on attacks against any creature that hasn' taken a turn yet.In addition if the creature that you attacked has not noticed you yet the first hit during the encounter counts as a crit.

Gate of the night

The bond you have with the shadows grows stronger.Starting at 9th level as a bonus action you learn how to make a small portal between two points that are less than 60 feet from eachother and are located under the presence of a shadow.The portal can be big enough to fit a creature of medium size or smaller.The portal stays open in consecutive rounds provided that you use your bonus action each turn to sustain it.This feature can be used a number of times equal to your proficiency bonus per long rest.

Unseen protocol

You have taught yourself that whoever is more aware has the upper hand.You gain advantage on initiative rolls.

Shadow-realm's awakening

The shades that once haunted your dreams are now your allies.As a bonus action you can choose a target that you can see up to 120 feet away from you.You make that creature vulnerable to the next attack.You can use this feature half your proficiency bonus (rounded down)per long rest.