Originally Posted by
memoryhole
Maybe the casters only want everyone to believe that only spellcasters can come through the portals. Maybe it's a lie that's been repeated over and over in order to protect the Magic Kingdom, and that the other casters have sworn to uphold (by killing anyone who attempts to get through the portal). The Hippiemancer might have to lie to save Parson's life, which she may do both out of a sense of wanting to preserve life and also (perhaps) out of a sense of duty to a fellow who doesn't really belong in Erfworld.