At 3rd level, a rogue gains the Roguish Archetype feature. Here is a new option for that feature: the Shadow Stalker.

Shadow Stalker

Though extended time spent withing dark corners and hidden places where the light doesn't reach, you have discovered the sinister truth of the shadows. Assassins who wish for a more advanced method to utilize their skills will choose to bind with this darkness, learning to manipulate it to aid their cause, and becoming a shadow stalker.

Shade Points When you choose this archetype at 3rd level, you discover a method to harness the shadows in the form of shade points. You have 3 shade points, and you gain one additional point every time you level up, to a maximum of 20 at level 20. You can never have more shade points than shown on the table for your level. You regain all spent shade points when you finish a long rest. Rogue Level Shade Points 3rd 3 4th 4 5th 5 6th 6 7th 7 8th 8 9th 9 10th 10 11th 11 Rogue Level Shade Points 12th 12 13th 13 14th 14 15th 15 16th 16 17th 17 18th 18 19th 19 20th 20

Shade Step Starting at 3rd level, you discover the paths between the shadows. When within Dim Light or Darkness, you can expend a shade point to teleport to another visible location within 60ft as a bonus action. The location must also be within Dim Light or Darkness.

Eye of Darkness At 9th level you have delved within the shadows long enough to see all that the darkness hides hides. You gain the ability to see in magical and non-magical darkness up to 60ft. You also learn the Unseen Servant spell, and can cast it as a Ritual. Your spellcasting ability modifier for this spell is Wisdom.

Stealth Within the Shadows At 13th level you are granted the ability to fade into the shadows. At the cost of 2 shade points you can use your action to hide in a dimly lit, or dark space without the need of a Stealth check. This grants you invisibility as long as you do not attack any creature and are within dim lighting, or darkness at the end of your turn.