Subelty

Subelty rouges focus on their powers to go unseen; and to strike in melee with daggers. They are unique to other killers in the sense that they have excellent battlefield control abilities, and can more easily escape capture or defeat.

Bonus Proficiencies

When you choose this archetype at 3rd level, You gain expertise with the disguise kit and the forgery kit.

Backstab

Starting at 3rd level, you are an expect at using a touch of mysticism in your technique. You are always lightly obscured, and can always hide, even if you would normally be visible anyway. In addition, when you attack a creature with a dagger while they cannot see you, you gain Backstab on the attack. A creature who is backstabbed before they take a turn in initiative is under the effects of Silence and cannot take actions until the start of your next turn. Otherwise, they are under the effects of Silence  and they have their movement speed reduced to 0; they take additional damage equal to the amount reduced.

Sap

Starting at 9th level, you gain the ability to manipulate creatures with strong vitality into lethargy. While you are holding a dagger, and if a creature within your reach cannot see you, you can use your action to Sap that creature. This action does not reveal your position, nor begin combat. If the creature has 100 hit points or fewer, they become sudden lethargic; and are incapacitated with a speed of zero for ten minutes. This effect ends if the creature takes damage, or if another creature uses their action to end the effect. If the creature has 101 more points or more, the sudden burst of lethargy slows their ability to think and move. It cannot take reactions, and on its next turn, it must choose whether it gets a move, an action, or a bonus action; it gets only one of the three. This effect lasts a minute, or until the creature uses an action to shake it off.

Vanish

At 13th level, you gain the ability to vanish suddenly from harm's way. When a creature makes a melee attack against you, you can use your reaction to Vanish, moving up to your movement speed in any direction. While vanished, you are invisible, attacks against you miss, and you succeed on saving throws that target exactly you (only you make a saving throw,  no other creatures). This effect lasts until the end of your next turn.

Once you use this ability, you cannot do so again until you take a short rest.

Shadow Dance

Starting at 17th level, you may use your bonus action to enter a deadly shadow dance, which lasts for one hour. As part of this action you may also make a stealth check. During that time, you are invisible to creature that can't see  past your stealth, ignoring special visions that would normally see you. In addition, using attacks and abilities from stealth other than spellcasting does not reveal your position, and creatures you Backstab take additional necrotic damage equal to your sneak attack dice; but in d4s instead of d6s.