Looking for an old comic book, you should be the same age as Sanyan. The protagonist is a boy. After eating the ghost, his body changed and became stronger.

I read a cartoon called "Shajieluo". It is not that he ate the ghost, but that the ghost ate him when he was a baby. Every ghost in Tianlong Babu, except his mother, Dragonfly, ate a part of his body and then spit it out and gave it back to him. As a result, every part of his body has the ability of the ghost, and his mother's dragonfly gave him the ability of eyes before he died. Every time he kills a ghost that eats him, he can restore some people. For example, the arm is Mohoroga sword, and the leg is Wei Tuotian's scud. There is a passage in the story. When he was chasing the catwoman who hurt his foster mother and sister, his legs changed first, then his arms were cut off, and finally he gave birth to a pair of wings on his back.