80s fantasy horror movie with magickal castle assault

Hi there fellow watchers. Looking for an old fantasy horror alike, medieval setting. I glimpsed at it once as a kid on TV [before 1992] and all I remember is the beginning. There was a POV of an intruder heading to a castle. He got rid of some guards producing a drill out of… stomach? He/it later kidnapped a princess and blinded her maiden servant leaving her on a floor, not gauging eyes out but rather making eye sockets to disappear.

Someone told me it might be a Warlock but I’ve already knew that movie well… Also not a Rumpelstiltskin.