why did I become a katana in the apocalypse?!

It was a normal afternoon. I was in my room playing games. But then there was a earthquake everywhere I think and after it ended I saw a game screen showing me that I would get a random power or something like that. Soon after I passed out as the screen show that I would become a katana?! What the fuck… After some time I woke up but I show nothing that all it was all dark. After some time I felt like something pick me up and then I show the game screen appear saying "will you accept his creature as you master?" Yes or no what the fuck?!