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With the new Skill that Kireina had created through her will and the use of the power she had accumulated after eating Milmeloth and Varilok, he was able to gather the wills and minds of the Gods she had eaten inside a special spiritual world similar to her Inner Realms, where the Gods would feel remorse for what they did, even if it were justified.
Perhaps some might find this as a fate worse than death, as these Gods would be imprisoned in this world until they could completely regret their actions, and then they could either stay inside of there for eternity or be reincarnated as someone new, who would, later on, regain the memories of its past life.
This was Kireina's selfishness, as Nirah desired of these Gods to have a second chance, she had made one.
Although such power also brought her many benefits, as there was now a council of Gods within this world ready to give her information of what they know, so she can easily access it.
Check "The Protagonist's Sister Is Actually the Strongest"!