When yet another massive riff, this time during the early stages of track nine ‘World Eater’, hits – you know the sort… the type of riff that makes your face do the same involuntary wince/”oooooo” combo as sucking a lemon straight after brushing your teeth might – the smile can’t help but break out on your face: The Conquering (Spinefarm Records) isn’t just Employed To Serve upping the ante; their fourth album goes deeeep.