The Witch War True Blood “Spellbound” Sundays, HBO, 10PM Written by Alan Ball Directed by Daniel Minahan “There’s no such thing as forever.” — Sookie True Blood started out as a series of murder mystery books, but is now pretty much a Southern Gothic soap opera. I’m no longer used to seeing this much violence in a single episode; I hate to say it came as a welcome change of pace, but it was more interesting than watching pretty people sit around and moan about their love lives. Given the generally slow pace of story development in this season, it…