Well, Brendan's doing the summoning in the basement of the Frat house. He has black magic that allows him to forcefully summon creatures, but the spell is supposed to reach out to bring his desire to him (a girlfriend) so we don't really need to know what would normally summon her to someone.<br/><br/>After Sophie and Fiametta's summons, hopefully everyone can get a good idea of what Master is looking for - just a taste of what's special about them appears when the spell succeeds (for instance, Fiametta would arrive in flame, of course... perhaps the Empusa would follow a wind that carried her sweet scent? stuff like that)