In a new trailer ominously titled Vengeance, season four of HBO’s popular medieval fantasy Game of Thrones looks like it somehow manage to top the body count of season three’s bloody climax. Opening with Arya Stark compiling a list of people she’s going to kill, bloodlust is something of a theme while you can expect more than a clutch of new characters too. Season four of Game of Thrones premieres April 6th on HBO.