Die Vecna Die!
The module is divided into three sections , each taking part in a different campaign setting: "Greyhawk" , "Ravenloft" , and "Planescape" . 
<triplet> Greyhawk <subj> campaign setting <obj> instance of <triplet> Ravenloft <subj> campaign setting <obj> instance of <triplet> Planescape <subj> campaign setting <obj> instance of