Being a high level Rune master Sukehime"s soul is 3 times that of a normal human soul, so when She chose to amputate 60% of her soul to form a secondary soul it really did have much strain or pain to Sukehimes"s original soul. When Sukehime"s original soul was split into primary and secondary souls in the ratio of 4:6, both the primary and secondary souls were still much stronger than a regular mortal soul. Being 1/4th of the original soul the primary soul was still stronger than normal soul by 0.2 units while the Secondary soul was stronger by 0.8 units.
So basically such reckless soul amputation did not affect Sukehime enough to threaten her life but in respects to her strength and rune mastery her power has fallen very sharply.
After the secondary soul was attacked by the curse Sukehime lost 1/6th of her original soul and soul power. Which in turn affected Sukehime"s Rune Mastery by decreasing it proficiency and mastery by a huge gap.
Therefore when Sukehime was trying to refine the Curse and her secondary soul together into an inscription it took her a lot of time and power to refine the Cursed inscription.
Since Sukehime has lost more than half of her soul she was no longer a high level rune master even though she had the knowledge and experience of a high leveled rune master she did not have the strength to back it up.
Therefore in order to make up for the lack of power Sukehime was utilizing her high level Rune mastery knowledge and experience to its utmost. This was a matter of her life and death therefore under the protection of 108 thunder tempering array forgot about the 34 masters of 13 allied families and other distractions she was completely focused on refining the Cursed Inscription.
But unfortunately what she dreaded the most happened, the Crying Heavens World will finally found out that Sukehime"s Soul had not been destroyed under the Curse, instead it was tricked by Sukehime into thinking that"s plan was a Success.
Cursed Incription is an advanced level Inscription its power mostly depends on the material and ingredients used in making it. So Cursed Inscription is not a new concept in the Crying Heavens world But the concept of using one soul as the primary ingredient to refine the cursed inscription was.
But it was not a taboo concept, using a onces own soul as part to create a Cursed inscription gave the Creator a huge control over the cursed inscription even after it has been deployed.
Most curse inscriptions after getting attached to the target lose connection with the creator and affect the target on their nature making it easier for a person with good knowledge of curse to dispel the curse. And high level curses inscriptions made using d.a.m.ned or pseudo souls have little consciousness and are able to fight back when someone tries to remove them making it harder to get rid of the curse with their own consciousness.
Cruse Inscription created using one"s own soul is similar to the Pseudo Soul Curse inscriptions they have consciousness but also maintain convection with the creator because the connection between them is strengthened by using the creator"s own soul. These types of the Curse are impossible to get rid of unless the creator is dead. The plus point of this type of Curse inscription is that since the Creator"s original soul is used as base to create the Curse inscription this Curse inscription can be reused by the creator multiple times.
Sukehime Curse inscription was deemed as taboo because the main ingredient of her curse the Matured d.a.m.ned soul of Skeleton general was a taboo life form for the Crying heavens.
And also because Sukehime has also added the heavenly rules and laws of devour as the principle to the Curse Inscription this way the Curse inscription is able to evolve by devouring the Soul of the target.
Since this Curse inscription is made by using Sukehime"s Secondary soul as base, Sukehimake could use this curse inscription infinite no. of times by adding the evolving attribute to the Curse inscription she has she clearly planned to make the strength of target Crying Heaven"s world will as her own allowing her to not only get rid of the limitations placed by the world"s will but she can grow stronger in process.
World Will being the guardian of the said world is able to monitor everything happening in the world as well as punish any thing that could potentially affect the world"s development.
Therefore when the Taboo 100,000 year old Skeleton general was born it was alert before it became a threat which even the world"s will could not handle. Similarly when Sukehime was Refining her Special Cursed inscription which used a taboo ingredient and taboo heavenly [laws and rules as the principles behind its working the world Will was alert by the world.
The world"s will, which was delighted thinking that it got rid of Sukehime, once again became frantic and aggressively scanned over Sukehime. It noticed that it only managed to kill the secondary soul of Sukehime but the primary soul of Sukehime seem to be well and trying to refine a taboo inscription.
Knowing that its enemy has not been killed but it was prematurely celebrating while the enemy was hatching a plan against it. In a fit of rage , anger and shame it unleashed the heavenly punishment on Sukehime.
Sukehime already knew that once she begins refining the Curse inscription the World"s will be alerted and will know that She was still alive. So, in order to Mask her presence from the perception of the World"s will she had already prepared an ancient artifact which could buy her some time by hiding her from the world will"s perception.
But she had overestimated herself and underestimated the creation of the Cursed inscription using matured d.a.m.ned soul, her secondary soul as the base and the soul devouring heavenly rule and law as the principle for the curse.
Sukehime had indeed overestimated herself, after losing more than half of her soul she was no longer the previous high tier Rune master but just a regular rune master with more experience and knowledge. Worst of all she underestimated the complexity of creating a curse inscription using taboo ingredients and principles.
Due to the complexity of the curse inscription she was creating and lack of power Sukehime had to focus all her power and strength into refining the curse. Therefore she was not able to lead a little bit of power and consciousness to operate the artifact to hide her from the world"s perception.
Because of which the world"s Will was able to find her as soon as she began refining the cursed Inscription.
Sukehime had no choice; it was either because she did not refine the Curse attached to her secondary soul as soon as possible into a curse inscription, then the Curse slowly spread to her body from the soul.
Leaving the 108 thunder Tempering array to deal with wrath of the world"s will, Sukehime gave her full and undivided attention into refining the Cursed inscription as fast as possible.