Toby and Maddie Arc/FicRecs
From Transcendence AU Wiki
Tales of a Dreambender, chapter 67: Joining the Cult of Dad by Lady_Phenyx (link)
Maddie and Toby accidentally join either the Cult of Endless Hymns or the Cult of Dipping sauce.
Cue hilarious misunderstandings and delightful shenanigans
Supernova by this_book_has_been_loved (link)
Twelve-year-old Maddie Pines is kidnapped by a cult and discovers that her adoptive father is the notorious Alcor the Dreambender.