Rogue: Fringe Seeker

Rogues can often pride themselves on their ability to hide from view, concealing themselves in crowds, or in shadows. A fringe Seeker is one who takes the pursuit of obscurity to new heights, using the fringes between planes to their advantage. These rogues have some inherent talent for magical abilities, but normally do not cast spells. Instead, they opt to use the planar magic of their surroundings to transfer in and out of the material plane, concealing themselves behind the fabric of reality.

As they use planar boundaries in their craft, fringe Seekers often travel to many planes, searching for new targets, treasures, or simply experiences. Slipping in and out of every reality makes them expert thieves, elusive spies, and excellent adventurers.

Fringe At 3rd level when you choose this archetype, you gain some knowledge of planar fringes, extradimensional spaces between planes of existence. As an action on your turn, you can open a small tear in your current plane and move into a planar fringe for about 12 seconds, or until the end of your next turn. fringes appear as an endless black space, whose air feels dense and heavy like water, but remains breathable. While within a fringe, you can see the creatures, structures, and land of the plane you just left within 20 feet of you, represented as blurry, indistinguishable glowing figures. Beyond this distance you can perceive the general form of things, but they appear substantially more blurry and difficult to focus on. You can't interact with things upon the plane, and simply pass through them, allowing you to move through otherwise solid surfaces. You can move freely within a fringe on your turn, though the thick atmosphere causes it to be difficult terrain. You can exit a fringe prematurely as a bonus action. When you would emerge from a fringe within an occupied space, you instead simply emerge in the nearest unoccupied space. While you are within a fringe, creatures on the plane you left can't see or hear you, and you are not affected by anything upon that plane. You gain one use of this feature at 3rd level, and again at 9th, 13th, and 17th levels. All expended uses are replenished when you finish a long rest

Emerging Swipe At 3rd level when you choose this archetype, you learn to strike at your enemies when exiting a planar fringe. If you exit a fringe as a bonus action on your turn, your first melee attack on this turn is considered a sneak attack and deals additional force damage equal to your Wisdom modifier.

Ether Strike At 9th level, you begin to learn techniques for interacting with corporeal beings from within a fringe. While you are within a fringe, you can use a bonus action to make a single unarmed strike targeting one of the glowing figures of a creature. On a hit the target takes psychic damage equal to 1d4 + your Wisdom modifier, and must succeed on a Wisdom saving throw whose DC equals 8 + your proficiency Bonus + your Wisdom modifier. On a failed save, the target is stunned until the beginning of your next turn, as its mind and self are assaulted from beyond. This unarmed strike can't benefit from your sneak attack feature.

Ethereal Escape When you reach 13th level, you learn learn to retreat into a fringe extremely quickly when in danger. After you make a successful Dexterity saving throw as a result of being targeted by a damaging effect, you can use your reaction to expend a use of your fringe feature and retreat into a fringe until the end of your next turn.