Arcane Scholar edge

I tried to DISCUSS GUILD PREREQ ARCANE SCHOLAR as a drow transmuter and received the message, "You will never be able to learn arcane scholar." I asked about it on the newbie channel and was told by An Immortal that it was a necromancer and conjurer only edge. I responded by noting that it is listed in the help file for TRANSMUTER EDGE LIST. I also asked why it would be only for necromancers and conjurers since it has to do with cancellation, dispel magic, and detect magic--all things that any pure mage can do. The Immortal suggested I bug board it.