My Skeleton Is so Impressive That It Can Be Upgraded by Itself

Lin Feng traveled to the world of summoners, where newborns with summoning qualifications will contract their own summons when they turn 16. Someone contracts an A-level powerful bear and can easily grow into a gold-level behemoth. Someone contracted with an SS-level amethyst winged lion, who was born with two wings and could soar through the world. When Lin Feng arrived, he was an F-level little skeleton, as if he was about to fall apart at any moment. Just when he was lamenting the coldness of life. "Ding, your little skeleton feels that he is too weak, feels very embarrassed, and wants to take a breath." This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.