Vinyl LP pressing. Edge of Thorns is the seventh album by American heavy metal band Savatage, originally released in 1993. This is the last Savatage album to feature guitarist Criss Oliva, who died six months after it's release, and their first release with Zachary Stevens on lead vocals, following the departure of Jon Oliva from his role as singer in Savatage, although he did produce and write songs for the album.