Hollow Knight

When a Hollow Knight is chosen, they receive a vision, typically of a large, pitch-black, subterranean cavern, strewn with corpses of pitch-black bodies, adorned with chitinous masks. A voice will come to them, two merged into one. A female, motherly voice and a male, authoritative voice deliver the message of their being and purpose. The message speaks of the chosen person being born of 'void', 'root', and 'god', and that their purpose is to 'defeat the haunting Light'.

A Hollow Knight, no matter the race, will wake with a certain sense of fulfilment, yet emptiness will also inhabit them. They will find their eyes have turned a constant, pupilless black. They will also find a weapon(s), a cloak, and a chitinous mask that will fit over their face perfectly. The weapon(s) will always be perfectly balanced for the Knight, and the cloak will fit over the Knight perfectly. If the weapon(s), cloak, and mask are all adorned, the person's body will become pitch-black, the mask will fully cover the head, and the cloak will remain the same, this is the proper form of a Hollow Knight, all racial traits are retained in this form.

Hollow Soul

Beginning when you choose this archetype at 3rd level, a void begins to grow in your soul, and it seeks to fill the emptiness it leaves in its wake. You are able to harness the void inside you to draw portions of the life essence that fills all creatures.

Whenever you hit a creature with CR greater than 0 with a melee attack you gain 1 Soul. You can hold up to 3 Soul, this maximum increase by 1 at levels 7,13, and 18 in this class.

By resting your body, the void within draws Soul from your very surroundings. When you take a short or long rest. Your Soul is filled to its current maximum.

Vengeful Spirit

Starting at 3th level, you can harness you've collected to damage those before you. As a part of your Attack action, you can replace any number of attacks with special Vengeful Spirit attacks, expending 1 Soul for every attack you replace.

Make a single attack roll (with Dexterity as your to-hit modifier) for all creatures within a 30ft by 5ft line in front of you. All creatures hit take 1d8 + your Constitution modifier in force damage. This damage increases to 2d8 at 7th level, 3d8 at 10th level, and 4d8 at 15th level, 5d8 at 18th level in this class

Shade Cloak

At 7th level, your experiences with the void within you have granted you greater movement across the battlefield. You can envelope yourself in a cloak made from void and launch yourself. As a bonus action, you can dash 15ft in a direction of your choice, this movement does not trigger attacks of opportunity. If you are in the air when you dash, you do not lose altitude.

Focused Recovery

At 10th level, you can use the Soul you gather to rejuvenate yourself. As a bonus action, you can spend 1 Soul to gain an additional use of Second Wind, you can immediately use the Second Wind feature in the same action.

Desolate Dive

Starting at 15th level, whenever you would fall you can instead opt to launch yourself towards the ground. You can use your reaction when you fall to reduce any falling damage you take by an amount equal to five times your Fighter level. All creatures within 10ft of your point of landing must make a DC 15 Strength saving throw or take 2d6 force damage and fall prone.

Once you use this feature, you must finish a short or long rest before you can use it again.

Form of The Shade Lord

At 18th level, you attain the truest form your vessel can take, The Shade Lord, master of void. You can use your bonus action to enter this form, your shell temporarily splitting to create this form. You gain temporary hit points equal to five times your Constitution modifier, resistance to bludgeoning, piercing, and slashing damage from non-magical weapons, and all your weapon attacks deal an extra 1d10 necrotic damage.

You can use this feature a number of times equal to your Constitution modifier, you regain all expended uses after a long rest.