Fairy Tail: A Mage? I'm Just Here to Borrow Some Power

The male lead transmigrates to the world of Fairy Tail. He comes with a cheat: a Magic Power Enhancement Device. From then on, the male lead takes a different path. Not only can he borrow Magic Crystal badges made by converting mages’ magic power to strengthen himself, he can also fuse multiple badges to create a new form? Come on, I’m not OOO, the king of debt. But after giving it a proper try, he discovers that this thing is seriously amazing. Of course, it does sometimes come with a few headaches. What if the other person won’t lend theirs? Easy! As a genius mage, awakening a magic ability isn’t asking too much, right? With the Devouring Magic he awakens, which can forcibly extract a mage’s magic power, combine the two… You’ll lend me this power whether you want to or not! One day, with the black Magic Crystal badge of the Black Dragon in one hand and the luminous Magic Crystal badge of the Meteor Star in the other, the moment the two fuse, an ultimate form that surpasses the gods is born…