Infiltrator

Your speciality is Stealth and gathering information in secret. You can turn Invisible at will and have spies that can do so as well. You learn the secrets of magic by uncovering mysteries, observing, and closely studying how other people control the weave. 

Level 3: Skillful Spywork

You always have Invisibility prepared. You can cast Invisibility on yourself without expending a spell slot. Doing so transforms the spell into Void Veil, which functions the same way as Invisibility does. When Void Veil is active, you gain vulnerability to all damage types until the spell ends. 

You can use Void Veil a number of times equal to your proficiency bonus and regain all expended uses when you finish a Long Rest.

Level 3: Shadow Servant

Whenever you finish a Long Rest, you can magically create one Shadow Servant within 5 feet of you. It is a copy of you, except that it is merely a shadowy silhouette. You can have a maximum number of Shadow Servants equal to your Intelligence modifier.

Stats. A Shadow Servant inherits your stats, proficiencies and expertises (saving throws, skills, tools, armour, weapons), senses and speed. It can equip and use any item, the same way you can. Its armour class is the same as yours without any equipment (e.g., armour, shield). Its hit point maximum is 1. 

Telepathic connection. You can telepathically communicate with your Shadow Servants within a range of 100 feet times your Wizard Level. While a Shadow Servant is within the telepathic connection range, you can take a Bonus Action to see through its eyes and hear what it hears until the start of your next turn. 

Recall. You can take a Magic action to teleport one of your Shadow Servants to an unoccupied space within 5 feet of you. Any equipment it was carrying before being teleported will be left behind at the Shadow Servants' original location.

The Shadow Servant in Combat. In combat, the Shadow Servants act on your turn. You can command (no action required) any number of Shadow Servants to move up to their speed and/or take one of the following actions, which it will use as a Bonus Action: Dash, Disengage, Dodge, Hide. You can take a magic action to command one Shadow Servant to take one of the following actions: 

Utilize. The Shadow Servant uses one of its equipped items to use it, activate one of its effects or attack with it.

Invisibility. The Shadow Servant can turn invisible until it uses any action other than Dash, Disengage, Dodge or Hide.

Level 6: Improved Void Veil

Void Veil no longer requires concentration. 

Level 10: Shadow Channelling

After using a Bonus Action to perceive through one of your Shadow Servants' senses, while you are doing so, you can cast your spells through that Shadow Servant. The Shadow Servant counts as the origin of the spell, and you use its senses when casting the spell. 

Level 14: Ultimate Void Veil

While Void Veil is active and while not concentrating on another spell, you can no longer be detected by any means. This includes protection against detection from any senses (Seeing, smelling, hearing, etc.), darkvision, blindsight, truesight, tremorsense, any magical scrying sensors, as well as protection against being targeted by any divination spell.