Smart People Never Say Steal, They Say Borrow.

There is something wrong with my system. He actually has nothing to reward me with. The only function is one word: steal. You can steal anything, whether it's talent or species, you can steal everything. The only trouble is that the owner of these powers will come to your door. I obviously said that I borrowed them, so why do you have to kill me? Look, after you die, your powers can only be mine.