@H i s o k a I think dark elves are born from the roots of the world tree.

@masayuki that means he has achieved a billion things like in games.For ex :- achievement for taking no damage from a boss for 10 minutes or so. Author just made that sh** up.

@Asura 333 Travelling between worlds comes at a cost. The greater the being travelling, the greater will be the cost. Take the example of moving a heavy object from point A to B. Lighter the object , less energy and force needed to move it.
These so called goddesses/gods of another world are powerful but not enough to bring in a strong being from another world. That's why they always go for some random weak guy from other world and train him/her to become strong.
The rules of a world doesn't apply to a being of another world so they grow quickly and easily.

@Raetard [The Fourth Wall exclaims that it is not interested in it at all and does not contain any record of them in it.]
[The Fourth Wall is only interested in palatable stories.]

@floating kettle the sister caused ruckus and severe injuries to her brother's subjects multiple times causing him to hate her.

@Dell Sen Yes, but at the end of the day it will be a single strong enemy rather than a stampede of countless ghosts.
Strong ones can be sealed but controlling multiple weak ones emerging one another is much more difficult and unpredictable.
For example :- a single powerful individual can be suppressed but suppressing a whole army of people (even though they are weak) is a lot more difficult as it gives birth to multiple variables and unpredictable factors. You can read and understand a single individual's intentions while confrontation , but multiple people can harbour various intentions causing unpredictable variables at every step.

@Dell Sen True. I agree wholeheartedly with you. But still they needed to do it.

@QDestructX kamiyo family sacrifice kept taisai at bay as with just a few sacrifices he didn't had to go out of his way to kill.
A rampaging wild best kills more that a somewhat tamed one.
Taisai was strong enough to be called g**.That means there was no one strong enough to actually subdue it.
If you say on the little girl yayoi captured it with ghosts then you are wrong plot armour effect helped her a lot.
On top of that even if you can see and capture ghosts using dolls , there is no way for you to dodge ones attack with a simple human body.

@Dell Sen even weak ones can kill you as you don't have a means to protect you.

@Dell Sen the spiritualists try their best to separate normal humans and the ghost as much as they can that reduces fear assimilation and social unrest.
The innocents are killed. Yes, that's true but they try their best to protect them.
Spiritualists are less in number, have shorter lifespan that ghosts, take a longer time to become stronger.
Even if you are a gifted one that can see or fight ghosts , you are not borne with plot armour that will give you time to grow. The moment you show signs that you can feel or see ghosts they start targetting you.

@QDestructX they have to decide onesidedly because it is not a democracy that requires years just to pass a descision not even a law.
By emotions you can choose to sacrifice everything and die with your loved ones. But, if you think a bit rationally then you would understand that what is a stake.
Bro this ghosts world is not like some fairy tale . They kill without thinking and you have to sh** tone of things just to survive a few seconds against them.

@QDestructX can you at least read with a little concentration the meeting they had before literally told us about what these bigshots do and how they were keeping an eye on every strong ghosts out there.

@Fourth wall If you think they can just train and help her in subduing all ghosts , then no this thinking can be considered a utopia.
It would include multiple deaths destruction like you read in so called hero versus demon king stories. On top of that after all this yayoi will be so strong that they would have to either kill her or seal her forever to avoid another destruction act

@QDestructX the strong ghost were maintaing territories like lion in a jungle, keeping other similar and weaker ghosts in control.
Yayoi destroyed that equilibrium by subduing tansai leading to a rampage among the ghosts to fill in the empty throne.
It caused social unrest and also increased the working load of the spiritualists. Even if they are strong they cannot protect everyone and with multiple ghosts and Gods rampaging , even they were in danger.
Furthermore, yaoyi is a walking disaster as she can subdue powerful ghosts and her morals and ideals were somewhat twisted due to trauma.

@Satan sorry accidently liked your comment

@Namjoon is bae Gollnir was right as the truth will be revealed sooner or later. It is just that what odin wanted to do after getting the relics of primordial gods was the worst descision ever.

@Lord Eternal Feesh sorry I misclicked you comment.