The PC's all wake up in an empty field. The weather is mild. The setting is pastoral. None of them have ever met. They have vague memories about their pasts. Details to specific to explain much, and broad ideas. "I was educated very well in a time honored institution..." where, what was it called, what did you study? "Umm... magic I guess..."
"My mother Had a ornate bluebird pin with cut glass eyes, and enamel paint. she always wore a black wool shall. she said it kept her safe..." Where did you grow up, who was your father, were you well to do? "...no idea..." a stranger approaches and hands them this:
then he is gone.