Nyven uses a bonus action to Dash, Disengage, or Hide.

Nyven can use an object as a bonus action, including manipulating thieves' tools or other items when the rules permit.

Nyven uses his reaction to halve the damage from one weapon attack he can see.

Nyven turns a failed attack roll, ability check, or saving throw into a success.

Nyven makes one weapon attack with a finesse or ranged weapon against a creature within range, adding 10d6 Sneak Attack damage once per turn when the conditions are met.

Choose four skills from the rogue skill list. Nyven is proficient in Acrobatics, Deception, Investigation, and Perception, in addition to his background proficiencies.

Double the proficiency bonus for two chosen proficiencies. Nyven has expertise with Stealth and thieves' tools.

Nyven has learned the secret mix of dialect, jargon, and code used by rogues and can communicate hidden messages in ordinary conversation.

Choose two additional proficient skills or tool proficiencies for expertise. Nyven has expertise with Perception and Investigation.

Nyven takes no damage on a successful Dexterity saving throw against an effect that normally deals half damage, and half damage on a failure.

Whenever Nyven makes an ability check that lets him add his proficiency bonus, he can treat a d20 roll of 9 or lower as a 10.

Nyven can sense the location of any hidden or invisible creature within 10 feet of him, provided he is not blinded or deafened.

Nyven gains proficiency in Wisdom saving throws.

No attack roll has advantage against Nyven while he is not incapacitated.

Nyven can climb faster than normal, and jumping distance is increased by his Dexterity modifier.

Nyven can choose two additional ability scores to increase by 2, or one ability score to increase by 2 and another by 1, subject to the normal maximum. This feature is gained at levels 4, 8, 10, 12, 16, and 19.

Nyven has advantage on Dexterity (Stealth) checks if he moves no more than half his speed on the same turn.

Nyven ignores class, race, and level requirements for using magic items and can attune to up to four magic items at once.

During the first round of combat, Nyven has two turns. He takes his normal turn at his initiative and a second turn at his initiative minus 10. He cannot use this feature when surprised.

Nyven knows the secret patterns of cities, including hidden passages, forgotten alleys, who controls which streets, and where to find food or shelter. He can find his way through any settlement he has previously visited, and can usually locate other street children, beggars, smugglers, or similarly marginalized contacts.