Roguish Archetype: Mistwalker (Remnant)

You have spent your life hiding in the mists. Swirling clouds of fog are your friend, a protective covering that hides you from prying eyes. You become well-versed in navigating without relying on your sight, and striking foes you can't see, while remaining hidden from view.

Mistweaver

Beginning at 3rd level, you can summon mists at any time. You gain the ability to cast fog cloud, with the target being yourself. Once you have used this feature a number of times equal to your Intelligence modifier, you must complete a long rest before you can use it again.

Mistsense

Starting at 3rd level, you have learned the nuances of the mist. Once in the mist, you gain mistsense. Mistsense activates once you enter mist, allowing you to use your bonus action to make a DC 15 perception check. On a successful check, you can tell the location of any creature within 20 feet within the same mist cloud removing the blinded status while within the heavily obscured fog cloud.

One with the Mist

Starting at 9th level, you are comfortable when surrounded by fog. When you are surrounded by fog or mist, you gain advantage on dexterity (stealth) checks and while moving through non magical difficult terrain costs no extra movement if you are under the cover of fog or mist. In addition, the radius of the fog cloud spell cast by your Mistweaver feature extends to 40ft and your mistsense extends to 40ft feet.

Mistblade

Beginning at 13th level, you can create a weapon out of mist. While in the mist, you gain access to a mistknife, a weapon made entirely out of mist. It has all the properties of a shortsword. Instead of its normal damage type, all damage dealt by the sword is psychic damage, leaving no physical damage wounds on the target.

Mistform

At 17th level, you are so familiar with the mists that you can melt into them yourself. You can cast the spell Gaseous Form on yourself at will.