Play Skills with Me? I Have Hundreds of Power Banks!

My name is Lin Yang. When you read this letter, I will have left the Middle East and returned to China. As for why I went to the Middle East, I don't know. I just remember that I woke up in this parallel world where very few people can summon Titan mechas. As soon as I opened my eyes, I saw a European who was slightly older than me and had yellow hair on his head. He looked a bit... Silly. I asked him to call him uncle. Then he pointed at another serious-looking, bearded Yugoslav man next to him and asked me to call him... Uncle? The slightly silly-looking man didn't react when he saw me. Then he pulled me towards another man with a slender figure and curly hair and a somewhat melancholy temperament, and asked me to call him uncle. Then he told me: There is a demon who wants to kill people both when he is happy and when he is not happy. He wants to kill me. Then they handed me a card with a purple metallic luster and a very... Plain-looking knife, and told me to hurry back to my country. He also asked me to hide my identity as a Machine Soul user when I return to China, and then pick me out after a few days when the limelight is over. Just like this, I returned to my country without knowing it as soon as I crossed over.