I think your 'accidental summon' idea is excellent, but unless our Explosive Mage was looking for a Succubus (which is not entirely impossible), we might want to point that blank at someone else.  However, that's up to Muse!  If he likes the idea of having diverted you here, then we go for it.<br/><br/>Keep in mind that you can fill in those blanks with anyone or thing, not just other PCs.  That's why you add story elements first and choose story threads second.  In this case, for example a good element might be a sorcerer or a necromanc...er, specialist in postmortem communications.  Who might end up as a Big Bad, to boot.