Speedster

The speedster subclass of rogue focuses on enhancing the classes movement capabilities, allowing them to duck in and out of combat easily.

Additional Proficiency

When you choose this archetype at 3rd level you gain proficiency in the Acrobatics skill.

Strengthened Legs

Starting at 3rd level, your extensive training focusing on your leg muscles has finally paid off. Your movement speed is now your base movement speed X your proficiency bonus. Any other effects that alter your movement speed are applied before this multiplier.

Agile Movements

Starting at 9th level, your movements have started to become much more agile when responding to danger. You gain advantage on Dexterity saving throws, and proficiency in acrobatics. If you already have proficiency in acrobatics you instead expertise in acrobatics. You also no longer provoke opportunity attacks when you move. 

Speedy Strikes

Also at 13th level, your speed can make it harder for enemies to see your attack coming. If you attack an enemy who, at the start of your turn, was 30 feet away from you, you gain a +5 to your attack roll, and a +3 to your damage roll. 

Superb Dodging

At 17th level, your mastery of speed is unrivaled and you are able to move in ways that make it much harder for enemies to hit you. You may now take the dodge action as a bonus action, and when you take the dodge action your AC increases by 5 until the start of your next turn.