Order of the Shadows

The Order of the Shadows is for blood hunters who dabble in the dark arts and completely become the monster they are trying to hunt. These blood hunters undergo terrible rituals made to give them full access to their dark potential. What they did not know was that their bodies cannot handle the power, so it becomes reduced, dulled even, to a point where it is accessible but nowhere near as powerful as they once imagined. Once like this, a blood hunter can never go back, and forever must live with an evil power dwelling in their souls.

Shadowstep

When you choose this archetype at 3rd level, you are able to begin harnessing the dark power inside of you. You become proficient in stealth.

You also gain this feature:

Surprise Attack

Make a stealth check. If you succeed, as an action you can choose an unoccupied space to teleport to 30 feet away. If you appear next to a creature, 5 feet or less away from you, you can make a surprise attack with a melee weapon.

You can use this feature once. You regain expended uses when you finish a short or long rest.

Stealth Adept

At 7th level, you begin to become one with the darkness. You have a double proficiency bonus to stealth.

You also gain this feature:

Cold Infusion

By touching your weapon as a bonus action, you can infuse it with a chill that cuts through bones. You may infuse one melee weapon of your choice, allowing it to deal cold damage in addition to its original damage type. Also, this infused weapons gains +1 to all attack rolls.

This infusion lasts until the end of your turn. You can use this ability twice, and you regain all expended uses during a short or long rest.

Shadow Meld

At 11th level, you begin to master the ability to bend the darkness to your will. As an action, you can assume a wraith form. In this form, you can wear any armor and wield any swords or shields that you were previously using. This form goes away if you are reduced to zero hit points or rendered unconscious. You can revert back to your original form whenever you choose (requires no action).

This form lasts for 1 minute. You can use this feature twice per long rest. This form grants the following abilities:

Incorporeal Body

While in wraith form, you gain resistance to all damage except psychic and radiant damage. Additionally, your AC decreases by your 1 while in this form and you are vulnerable to radiant damage.

Incorporeal Movement

While in wraith form, you can move a distance 10 more than your speed through any objects or creatures around you. Creatures and objects you move through are considered rough terrain. If you end your movement inside any solid object or creature, you take 1d10 force damage.

Stealth Mastery

While in Wraith form and inside of a creature or object, all stealth checks made instantly succeed.

Darker Wraith

At 15th level, you forge a deeper connection with the darkness inside of you. You can change into your wraith form as a bonus action. Also, while in wraith form, you have advantage on all stealth and sleight of hand checks. Additionally, while in wraith form you can sense any fey, fiend, or undead 180 feet in any direction from you. You know what type of creature they are and how many there are, but you cannot tell their exact location, just their general direction. 

Dark Ressurection

At 18th level, you body has completely transformed into shadows. You can assume the wraith form at any time (no action required). Additionally, all damage dealt by you, whether or not you are in wraith form, is considered magical cold damage for the purpose of overcoming resistances. 

You also gain this feature:

Shadow Life

When you are reduced to zero hit points or are knocked unconscious, you can choose to shift into a shadow form instead. While in this form, you are immune to all damage and cannot attack. If any creatures moves into a five foot radius from you, they make a constitution saving throw and take 4d10 cold damage, or half on a successful saving throw (DC of 8 + proficiency bonus + constitution modifier). While in this form you can recieve healing, and if you receive healing that brings you to 1 hit point or more, this form ends instantly and you revert back to your original form alive again.

This feature can be used once per long rest.