What was the lawful good action in this situation?The rightful D&D-Paladin course of action would be to rage against the dying of the light by repeatedly bashing your face against Mal'ganis while killing zombies AFTER they turn. It wouldn't be remotely practical, which is why Arthas went for an unironic Hard Man Making Hard Decisions about the pretty-clearly-set-up-even-then fall-bait.