Therin raises an eyebrow.  "Sounds like a dangerous quest.  While whatever magics you may have used have found, perhaps, people who are worthy of it..." (she glances at the other three surviving adventurers appraisingly) "A serious question remains.  Why should we aid you with this 'evil cult'?  I find it likely they posed no threat to us before this moment... so what, bluntly, is in it for us?  Especially seeing as you are sending us to deal with this problem alone.  You say you do not have the time to deal with so many problems.  Do you have the resources to compensate us for our efforts?  Perhaps to even aid those efforts?  I wouldn't be adverse to some items of power... which would aid us in our quest, and aid you in gaining my valuable assistance at the same time."