Until recently I had no idea this was even a thing! The original run of House of Mystery was as a horror anthology and after several years in the mid-1960's with super hero tales it went back to that format. It had a good run which ended in 1983 but then in 1986 DC comics published a new series - Elvira's House of Mystery. It sadly only lasted 11 issues plus an oversized special. From what i'm told this series was sort of a follow up used to publish stories that hadn't been used in the original series, with the added selling point of famed horror movie hostess Elvira taking over from Cain and adding her two cents worth to the proceedings. I've found two issues in bargain bin boxes and with a little luck I'll grab the rest in the same manner! The hunt is on.