Assassin — Sagor från Valoris

The Assassin is the rogue as a professional in the truest, coldest sense — someone who has studied the killing of a single target the way a scholar studies a language, and reduced it to a craft. They win in the first heartbeat or not at all: from ambush, in disguise, with a poisoned blade already moving before the mark has understood there's danger in the room. To an Assassin, a fair fight is simply a job done badly.

It is the most lethal opener of any archetype, and the most patient path to it. An Assassin slips into a place wearing another face, waits for the moment of perfect surprise, and ends it with a strike that most creatures cannot survive. Between kills they are forgers, mimics, and poisoners, building the false lives and quiet tools that let them get close. Where the mark expected a stranger, they find their own death — and far too late.

Archetype Features

Rogue Level	Feature
3rd	Assassinate, Assassin's Tools
9th	Infiltration Expertise
13th	Envenom Weapons
17th	Death Strike

3rd Level

Assassinate

You are built for the ambush. You have Advantage on Initiative rolls, so you rarely lose the race to strike first. And during the first round of combat, you have Advantage on attacks against any creature that hasn't yet taken a turn — and the first time your Sneak Attack lands that round, it deals extra damage equal to your Rogue level. A well-set ambush is very often the whole fight.

3rd Level

Assassin's Tools

You carry the trade's essentials. You gain a Disguise Kit and a Poisoner's Kit, and proficiency with both — the means to become someone else entirely, and to make sure a single cut is all a job requires.

9th Level

Infiltration Expertise

You can become almost anyone. Through Masterful Mimicry, after an hour's study you can flawlessly copy a person's speech, handwriting, or both. And through Forgery, you can build a false identity so thorough — over days of careful effort — that others have Disadvantage on any check to discover it isn't real. You wear other lives like coats.

13th Level

Envenom Weapons

Your poisons bite deeper than any antidote expects. When you use the Poison option of your Cunning Strike, the target also takes 2d6 Poison damage each time it fails the saving throw — and that damage ignores Resistance to Poison, cutting through the very defenses your marks most rely on.

17th Level

Death Strike

The perfect ambush becomes a killing one. When you hit a Surprised creature with your Sneak Attack in the first round of combat, the target must succeed on a Constitution saving throw (DC 8 + your Dexterity modifier + your Proficiency Bonus) or take double damage. Against an unprepared foe, that first strike is very often the last thing they ever feel.