In short, Sir Tann wants to use the power of nine ancient obelisks to restore his country, which was destroyed in the past, but since he is undead, they don't accept him, so we... or rather, you will have to visit them instead of him. And since each one should contain a fragment of his soul, these visits will "count" in his favor. Something like that.
Ничто не возникает из ничего и ничто не пропадает бесследно.
Если где-то чего-то убудет, то в другом месте добавится.
(Закон сохранения).