Samsara, as a being so strong, couldn't possibly let these beings that killed his son, which he had to give an important task such as creating a System, to get away with this.
Not at all!
As the avatars of all the Transmigration Gods glanced at their all-father sit over his throne inside of his palace, as many Celestials wearing golden equipment stood around him, Samsara decided to speak.
"I am pleased to see all of my children gathered here… I suppose most of you already know what had happened with Hekaton, isn't it? I… as a father, cannot let this slide. One of your siblings is gone, and any of you could be next. For this reason, I shall begin a crusade to exterminate these beings!"
...Meanwhile, far away from Samsara's Great Divine Realm.
Check "The Protagnist's Sister Is Actually the Strongest"!