Flash

The average Rogue can dispatch a single target in a heartbeat, and slip back away into the shadows like they were never even there. Flashes can strike down multiple unfortunate souls in the blink of an eye, with efficiency that would make any wanted group cower and hide.

 

Stance of Swiftness

When you choose this archetype at 3rd level, your speed increases by 10 feet.

In addition, you gain both the Two-Weapon Fighting fighting style and the Dual Wielder feat. If you engage in Two-Weapon Fighting, you may make your off-hand weapon attack as a part of the Attack action instead of with your bonus action.

Crowd Control

Starting at 3rd level, you have learned how to take down multiple targets simultaneously. You have advantage on attack rolls against any creature that is within 10 feet of another creature you already have advantage against. This bonus cannot stack with itself.

Additionally, when you strike two or more creatures during the same turn which you can deal your Sneak Attack damage to, you can divide your total Sneak Attack damage dice as you choose amongst those targets.

Killing Streak

Starting at 9th level, your single deadly blows transform into an onslaught of precisely aimed strikes.

You can attack twice, instead of once, whenever you take the Attack action on your turn. In addition, whenever you deal Sneak Attack damage to a creature and simultaneously reduce them to 0 hit points, you gain a 1d4 bonus to the next attack roll you make.

Motion Quickness

At 13th level, your mastery of movement makes high speed simple to you. Your speed increases by a further 10 feet, and your jumping distance can be determined by your Dexterity score, rather than your Strength score.

In addition, whenever you and your group travel at a normal pace, you can still attempt to move stealthily.

Onslaught

Starting at 17th level, you can speed up until even light cannot catch you. As an action, choose up to five creatures you can see within 30 feet of you. Make a melee weapon attack against each target. On a hit, a target takes 5d10 damage (the damage type is determined by your weapon), but can also add any bonus damage die, including your Sneak Attack feature, and can be used in conjunction with your Crowd Control feature.

At the end of each of your strikes, you can teleport to an unoccupied space you can see within 15 feet of one of the targets you hit or missed.

You can use this feature a number of times equal to half your proficiency bonus, and you regain all expended uses when you finish a long rest.