Clothing
Wondrous Item, Legendary,
Requires Attunement by a Monk or Rogue
Shadow Walker: While you are attuned to this outfit you gain a +5 bonus to all Dexterity (Stealth) checks and have advantage on Wisdom (Perception) checks to spot hidden creatures.
Unseen: Whilst attuned to this outfit you can use an action to cast invisibility on yourself. You can use this feature twice per long rest.
Fade From View: Whenever you kill a creature on your turn, you may choose to become Invisible at the end of that turn. This effect lasts until the end of your next turn or ends early if you attack or cast a spell.
Precise Assassination: Whenever you roll a 1 on a damage die, you can reroll the die and must use the new roll.