In a way, Tyll'a's situation regarding magic is the result of an arcanima-related curse. Basically, his mother (an arcanist) botched a summoning and ended up cutting off the infant Tyll'a's access to his aether, making him the FF14 equivalent of a Squib from Harry Potter. Unfortunately for him, the aether cutoff is permanent, forcing him to rely on magitek for anything resembling magic.