My System's AI Is a Weeb?

A system bearing character is quite a common read, don't you think? But what if the way that system worked was different for once? Silius had gained a system that hadn't fancy features such as a shop or free points to distribute across his stats, it seemed that the system was complete garbage, but it was a blessing in disguise, as the only advantage he got from the system was a companion, an earth system companion to be exact, now just imagine having 21st century information in your hands in as a slightly advanced medieval society, you could use that knowledge to destroy a county by making a nuke bomb, or revive it using the advanced medical techniques, but what if we added magic to that knowledge, how much power could you have with those two elements combined?