The Moon Summoner in the Apocalypse

A young boy accidentally came to a post-apocalyptic zombie world. Not only did there not be a so-called golden finger, it was also completely desolate and he had no idea how to survive. After relying on the identity of the original owner of this body to survive in this world for a day or two, when he was at a loss and depressed, a purple figure suddenly appeared in front of him... "Oh, why are you sitting on the ground with an anxious look on your face?" [Possibly OOC warning, please read at your discretion. ]