She can take a bonus action on each of her turns in combat to Dash, Disengage, or Hide.

At 3rd level, she can use the bonus action normally granted by Cunning Action to make a Dexterity check to pick locks, disarm traps, or use thieves' tools, and can use the Use an Object action as a bonus action.

Beginning at 1st level, Varenia is especially adept at finding hidden pathways, reading danger, and escaping notice. She gains proficiency in thieves' tools and can gain expertise in two of her proficient skills, doubling her proficiency bonus for those skills.

She uses a pool of dice to deal extra damage once per turn when she has advantage on the attack roll, or when another enemy of the target is within 5 feet of it and she does not have disadvantage. At 20th level, Sneak Attack deals 10d6 extra damage.

She knows the secret mix of dialect, gestures, and coded hints used by thieves and criminals to convey hidden messages to one another.

At 3rd level, Varenia adopts the Thief archetype, becoming especially skilled at burglary, agility, and quick hands.

Her reflexes become even deadlier. Beginning at 5th level, when an attacker that she can see hits her with an attack, she can use her reaction to halve the attack's damage.

At 6th level, she gains expertise in two more of her proficiencies, further honing her chosen specialties.

At 7th level, she can nimbly dodge out of the way of certain area effects, taking no damage on a successful Dexterity saving throw and only half damage on a failed one.

At 3rd level, she gains an additional 10 feet of climbing speed, and she can use running jumps more effectively after a short movement.

At 9th level, she gains proficiency with the disguise kit and the forgery kit, and her speed is unaffected by climbing.

At 13th level, she can use magic items even if they are normally restricted by class, race, or level, and can ignore the race, class, and level requirements on the use of magic items.

At 14th level, she becomes so elusive that no attack roll has advantage against her while she isn't incapacitated.

At 15th level, she is exceptionally hard to pin down. Attack rolls against her do not gain advantage merely because she is hidden or otherwise difficult to target, and when she is subjected to an effect that requires a Dexterity saving throw, she takes no damage on a success and half on a failure, even if incapacitated. In addition, she cannot be surprised while she is conscious.

At 17th level, if she misses with an attack or fails an ability check or saving throw, she can turn the failure into success once per short or long rest.

People of the land recognize Varenia as someone who stood up to danger on behalf of ordinary folk. She can usually find shelter, food, or assistance from common people who remember her deeds or have heard of them.