An Unreliable Master and Disciple

I transmigrated to a fantasy world in the most traditional, ordinary, and utterly unsurprising way!

But why does everything here seem so unreliable?

I transmigrated and found an old man living inside me?

And it turns out this old man isn't even powerful?

A geezer who's cultivated for eight hundred years and is still only at Foundation Establishment has the nerve to be my master?

And this damn System claims it can grant two wishes at once?

Can't you be a little more reliable?!

This novel and its characters are entirely fictional. Any resemblance to actual people or events is purely coincidental. Do not imitate.