10yo boy that is born with forever baby syndrome he hasn't grown up past that of an infant.

Hello. If you are from a reddit post (https://www.reddit.com/r/shortstories/comments/gfcwrf/comment/ixs5dpp/?context=3) I'm hoping that I left my account details to everyone that asked. If not, help out your fellow passengers. Assuming everyone's here, let me summarize for the newcomers. This story follows an unfortunate victim of ritualistic sacrifice, but with a twist. After surprise-sacrificing the cultists, their otherworldly patron latched onto our protagonist with an offer to join them. After accepting, we get to explore the world of eldritch powers, body modification, and follow our protagonist as he culls the worst of the worst. --