Hogwarts: Please Stop Stealing My Skills!

A skilled thief gains a System in another magical world. At first, the System seems useless, since he hasn't unlocked any features. But...

The System's first feature has been unlocked.

Congratulations. You have unlocked the Class feature. Thanks to your existing skills and experience, you have gained the special class "Arcane Thief" as your starting class. There's nothing an Arcane Thief can't steal. The more you steal, the more your class will progress.

Areas of expertise include:

-Stealth magic

-Wards

-Traps

-Barriers

-Pickpocketing

-Wielding knives and daggers

And more...

This is only the first feature?

This novel and its characters are entirely fictional. Any similarities to real people or events are purely coincidental. Do not imitate.