Scourger

'"These Scourgers, what are they? Artillery? Assassins?"

"They are both. Hidden spies and destroyers. Executioners."

Bonus Proficiencies

When you choose this archetype at 3rd level, you gain proficiency with the disguise kit and the poisoner's kit.

Spellcasting

Scourger Spellcasting			Spell Slots per Spell Level
Rogue Level	Cantrips Known	Spells Known	1st	2nd	3rd	4th
3rd	2	3	2	-	-	-
4th	2	4	3	-	-	-
5th	2	4	3	-	-	-
6th	2	4	3	-	-	-
7th	2	5	4	2	-	-
8th	2	6	4	2	-	-
9th	2	6	4	2	-	-
10th	3	7	4	3	-	-
11th	3	8	4	3	-	-
12th	3	8	4	3	-	-
13th	3	9	4	3	2	-
14th	3	10	4	3	2	-
15th	3	10	4	3	2	-
16th	3	11	4	3	3	-
17th	3	11	4	3	3	-
18th	3	11	4	3	3	-
19th	3	12	4	3	3	1
20th	3	13	4	3	3	1

Spellcasting

When you reach 3rd level, you augment your roguish prowess with the ability to cast spells.

Cantrips

You learn two cantrips of your choice from the wizard spell list. You learn another wizard cantrip of your choice at 10th level.

Spell Slots

The Scourger Spellcasting table shows how many spell slots you have to cast your spells of 1st level and higher. To cast one of these spells, you must expend a slot of the spell's level or higher. You regain all expended spell slots when you finish a long rest.

For example, if you know the 1st-level spell Charm Person and have a 1st-level and a 2nd-level spell slot available, you can cast Charm Person using either slot.

Spells Known of 1st Level and Higher

You know three 1st-level wizard spells of your choice.

The Spells Known column of the Scourger Spellcasting table shows when you learn more wizard spells of 1st level or higher. Each of these spells must be of a level for which you have spell slots. For instance, when you reach 7th level in this class, you can learn one new spell of 1st or 2nd level.

Whenever you gain a level in this class, you can replace one of the wizard spells you know with another spell of your choice from the wizard spell list. The new spell must be of a level for which you have spell slots.

Spellcasting Ability

Intelligence is your spellcasting ability for your wizard spells, since you learn your spells through dedicated study and memorization. You use your Intelligence whenever a spell refers to your spellcasting ability. In addition, you use your Intelligence modifier when setting the saving throw DC for a wizard spell you cast and when making an attack roll with one.

Spell save DC = 8 + your proficiency bonus + your Intelligence modifier

Spell attack modifier = your proficiency bonus + your Intelligence modifier

Infiltration Expertise

Starting at 9th level, you can unfailingly create false identities for yourself. You must spend seven days and 25 gp to establish the history, profession, and affiliations for an identity. You can't establish an identity that belongs to someone else. For example, you might acquire appropriate clothing, letters of introduction, and official- looking certification to establish yourself as a member of a trading house from a remote city so you can insinuate yourself into the company of other wealthy merchants.

Thereafter, if you adopt the new identity as a disguise, other creatures believe you to be that person until given an obvious reason not to.

Impostor

At 13th level, you gain the ability to unerringly mimic another person's speech, writing, and behavior. You must spend at least three hours studying these three components of the person's behavior, listening to speech, examining handwriting, and observing mannerisms.

Your ruse is indiscernible to the casual observer. If a wary creature suspects something is amiss, you have advantage on any Charisma (Deception) check you make to avoid detection.

Eldritch Executioner

By 17th level, you are a master at catching enemies unaware. You gain the following benefits.

Arcane Ambush. If you are hidden from a creature when you cast a spell on it, the DC of any saving throw it makes against the spell this turn is increased by 1.

Assassinate. You have advantage on attack rolls against any creature that hasn't taken a turn in the combat yet. In addition, any hit you score against a creature that is surprised is a critical hit on a 19 or 20.

Magical Sneak Attack. When you hit with a spell attack, and it could trigger your Sneak Attack feature if you had instead used a finesse or ranged weapon, you can once per turn deal additional damage equal to your Intelligence modifier.

Undetectable. You and the items on your person cannot be detected by divination spells.

Credit to Matthew Mercer for inventing Scourgers.