well, this is not a spoiler, just my thought. I think all creatures in this dungeon are Lich's summons. as you can see, they said, all others that weren't eaten by ants come back. thus, they can't be arised again by Jinwoo. the only living creature here is Lich who was already programed 'to kill all humans'. if Lich does not die in 7 days, the dungeon will break.
so this Lich is destined to die here for Beru's sake. hehehe (because Beru can use powers and knowledge from creatures that he eats.) and it's better to let ants eat all things here to increase army's strength, instead of wasting them.
so this Lich is destined to die here for Beru's sake. hehehe (because Beru can use powers and knowledge from creatures that he eats.) and it's better to let ants eat all things here to increase army's strength, instead of wasting them.