Harry Potter: The Terraria Cultist

[Harry Potter Fanfiction] [No Female Lead] [The Protagonist Isn't a Good Person, Just a Malicious Jester]

As a cultist who follows the rules, isn't it only right for me to be defeated by the protagonist?

But once the hero's story is over, doesn't that make the hero useless?

After sealing away the hero, the cultist from Terraria set out on the path to becoming an eldritch god. Then, one day, he met someone who could only cast the Forgetfulness Charm...