Rogue Archetype: Stalker in the Mists

Some rare individuals are born with an innate and curiously specific aptitude, allowing them to magically shape and channel ambient vapours as they will. Though a niche talent often overlooked or even left undiscovered in those so blessed, it is nonetheless one with obvious and invaluable applications, particularly for those in military or intelligence endeavours and far less reputable lines of work. While most will rarely exceed a basic affinity with their element, a select few go on to achieve mastery over their gift, allowing them to fundamentally transcend their physical form and join with the roiling shrouds they command.

Mistcaller

Starting at 3rd level, as a bonus action, you can cast the fog cloud spell. A spell cast in this way doesn't use components, is cast at a level equal to half your Rogue level, can be dismissed as a bonus action, and has a duration of 1 minute until you cast this spell again, or 1 hour with concentration. Fog created by this spell cannot be dispersed, and its area is heavily or lightly obscured (your choice). As a bonus action, you can make the fog's area heavily or lightly obscured, or move it up to 60 feet to a space you can see.

You can use this feature once, gaining an additional use whenever you gain another feature from this archetype after Rogue level 3. You regain all expended uses of this feature when you complete a short or long rest.

Ghost in the Fog

At 3rd level, while in mist or fog, you can attempt to hide even when only lightly obscured, and you have advantage on Stealth(Dexterity) checks.

Fade Into Mist

At 9th level, while in or adjacent to mist or fog, you can teleport as a bonus action. If you do, you magically dissipate into fog and reform in an unoccupied space you can see in or adjacent to fog or mist within 120 feet. You can then attempt to hide (no action required).

When you use this feature, you can't use it again for 1 minute unless you expend a use of your Mistcaller feature to do so, or until you cast fog cloud.

Credits:

First image, Impenetrable Fog, Saul Zaentz: https://ultracold.deviantart.com/art/Impenetrable-fog-342314322

Brew by Surrealistik



One With Fog

At 13th level, mist and fog don't obscure your vision, and you can never be surprised by creatures and objects in them. While these creatures are within 30 feet of you, you have truesight and blindsight against them, and know their exact location.

Further, you can expend a use of your Mistcaller feature to cast the gaseous form spell, or two uses to cast the wind walk spell. Spells cast in this way can only target you, don't use components, are cast at a level equal to half your Rogue level, can be dismissed as a bonus action, and have a duration of 8 hours with concentration, or 1 minute (your choice).

Stalker's Resurgence

At 17th level, once per long rest, when you are reduced to 0 hit points or killed while in or adjacent to fog or mist, you can magically discorporate into a plume of spectral vapours. If you do, you revive at the start of your next turn, regain a use of your Mistcaller feature and hit points equal to twice your Rogue level, reforming in an unoccupied space in or adjacent to mist or fog within 120 feet. You can then attempt to hide. If you cannot reform in this way, you die.