The system is not lying. He knows that fact. The system functions like a computer program designed to automatically guide the users on the platforms they are using.
The big mystery here is the person behind the 'system'. It must be the same person who brought him into this world...
But...
Lucien did not have time to ponder such things. Not when the immediate danger of the little protagonist is at hand. There was no way he could come with the little protagonist to the Demon Slayer base.
The system has said he doesn't have definite powers, nor can he use the same offensive magic as the Warriors and Mages. His current body functions like an empty container. Its job is to absorb light magic in the air, store and transform it within his body, before pouring it out to create new products like those level pills.