The system notifications were indeed very thoughtful, but they were also quite tricky.
Perhaps it was because the system notifications were just a brief introduction, there was always more details following behind to add some more information.
After Ye Chen discovered this characteristic of the system, he developed the habit of checking the details every time. In the end, he really did find it hiding key information in the details several times.
It was the same this time.
According to the system notification, the sacrificing ritual of the Spirit Sealing Altar was to use the blood and Spiritual Energy of mutated beasts with similar attributes and levels to control the target.
It was the use of the word "sacrifice" that made Ye Chen think that he needed to kill a mutated beast to offer its blood. He even felt depressed for a moment.
But when he clicked into it and looked at the details, he deeply felt that his feelings had been played with.