So many ways this can go, but here are a few ideas:
A) Credence grows up much like Harry with the Dursleys. He spends the school year at Ilvermorny receiving a magical education, only to return to Mary Lou Barebone and her tender mercies during the summer. Through some A+ parenting (re: manipulation), Mary Lou ensures Credence remains with the church, swallowing his magic and taking his medicine (re: consenting to her beatings to spare his sisters).
Everything's going, well, not fine, but Credence has it handled...until a magical accident puts him on MACUSA's radar.
Cue Graves choosing Credence as his candidate in the Auroror trials.
B) Whatever. Just as long as we get to see Graves mentor Credence a la Harry and Eggsy, all the while showcasing Credence's capabilities...
Gradence: Kingsman Style
A) Credence grows up much like Harry with the Dursleys. He spends the school year at Ilvermorny receiving a magical education, only to return to Mary Lou Barebone and her tender mercies during the summer. Through some A+ parenting (re: manipulation), Mary Lou ensures Credence remains with the church, swallowing his magic and taking his medicine (re: consenting to her beatings to spare his sisters).
Everything's going, well, not fine, but Credence has it handled...until a magical accident puts him on MACUSA's radar.
Cue Graves choosing Credence as his candidate in the Auroror trials.
B) Whatever. Just as long as we get to see Graves mentor Credence a la Harry and Eggsy, all the while showcasing Credence's capabilities...