The Secret Path.
Han Dong had indeed seen a similar term -'Secret Country' in Miss Jane's guidebook.
Any target killed by Miss Jane's 'Second Ritual', its soul will fall into the Secret Country, never to reincarnate.
Listening to the witch's explanation, Han Dong himself was somewhat puzzled.
The 'Material Circulation' of the Fate Space is subject to absolute constraints.
Any 'Material', whether it is tangible or intangible knowledge, requires a corresponding price to be paid for it to be transmitted between worlds.
"Could it have something to do with 'Closeness'?
Once the degree of closeness reaches a certain height, are we allowed to receive 'Gifts' from NPCs, thus eliminating the need to pay the cost of world transmission?
There is a possibility, after all, my closeness with Miss Jane during the last period of time together had far exceeded the level of 'Friendliness'."
Having said that, Han Dong felt a little regretful.