You can take the Dash, Disengage, or Hide action as a Bonus Action.

Use a Bonus Action to apply poison to a weapon with your Poisoner’s Kit.

You can gain Advantage on your next attack this turn if you have not moved, then your Speed becomes 0.

Halve the damage from a visible attacker that hits you.

Add 9d6 damage once per turn when Sneak Attack conditions are met.

You gain Expertise in Sleight of Hand and Stealth, doubling your proficiency bonus for checks using those proficiencies.

You know Thieves' Cant, a secret mix of dialect, code, and signs used by criminals.

You gain mastery with four Simple or Martial weapons. Chosen weapons: Dagger, Shortsword, Shortbow, and Scimitar.

You gain the Assassin subclass features.

You gain the Alert Origin feat, which grants a +2 bonus to Initiative rolls and allows you to swap Initiative with a willing ally after rolling Initiative.

You gain the Tough Origin feat, increasing your hit point maximum by twice your level, for a total of 36 additional hit points at level 18.

You gain an Ability Score Improvement or another feat for which you qualify. The provided ability scores are treated as final.

When you deal Sneak Attack damage, you can forgo Sneak Attack dice to apply Cunning Strike effects such as Poison, Trip, or Withdraw.

You gain Expertise in Perception and Investigation, doubling your proficiency bonus for checks using those proficiencies.

When you make a Dexterity saving throw to take half damage, you instead take no damage on a success and half damage on a failure.

Whenever you make an ability check using a proficient skill or tool, a d20 roll of 9 or lower counts as a 10.

You gain an Ability Score Improvement or another feat for which you qualify. The provided ability scores are treated as final.

You gain additional infiltration expertise, allowing you to create false identities with established histories, appropriate documentation, and convincing social details.

You gain an Ability Score Improvement or another feat for which you qualify. The provided ability scores are treated as final.

Your Cunning Strike gains additional options, including Daze and Knock Out, with their specified Sneak Attack die costs.

You gain an Ability Score Improvement or another feat for which you qualify. The provided ability scores are treated as final.

You gain additional Devious Strike options, allowing you to forgo Sneak Attack dice to inflict powerful conditions and tactical effects.

You gain proficiency in Wisdom saving throws and Intelligence saving throws. Intelligence saving throw proficiency is already granted by your Rogue class.

You gain an Ability Score Improvement or another feat for which you qualify. The provided ability scores are treated as final.

When you hit a creature with Sneak Attack during the first round of combat, the attack deals extra damage equal to your Rogue level. You also have Advantage on Initiative rolls.

Attack rolls against you cannot have Advantage unless you are Incapacitated.

You gain the Assassin feature that lets you study and imitate a creature's appearance, speech, handwriting, and mannerisms well enough to pass as that person with preparation.

When you hit a creature with an attack during the first round of combat and the attack qualifies for Assassinate, the target must succeed on a Constitution saving throw or suffer the Assassin's devastating additional effect.

You know how to find or create illicit contacts, safe houses, fences, and other criminal services. In a settlement, you can usually identify a person willing to provide discreet assistance, provided the request does not place them in immediate danger.