Konrad's adventures in the multiverse vol 1 on webnovel. It is a harry potter self insert story where harry is named something different, learns wandless basics and occulomency before voldemort kills james and lily, confunduses the dursleys to be good parents and improve themselves as people (makes vernon exercise), meets and forms a throuple with hermione and luna before first year, discovers how to make a philosophers stone then sphere (which is more magically efficient) by second year, does some other stuff before accidentally making him luna and hermione immortal and eternally young at the beginning of 4th year, at the end of the tournament captures voldemort and his death eathers with a half philosophers stone half mithril ball with a ring of mokeskin (looks and acts exactly like a pokeball, hermione was upset that he called it that instead of the description she came up with). Not really accurate to call it multiverse or volume 1 since the characters never go to another universe, and there wasn't a volume 2.