For it to have any decent effect, he would probably need to go through billions of liters of blue blood to actually learn this knowledge, a project that would take a few years to appear in Kayden's mind.
"The effects are low, not worth the effort so far," Kayden commented to his viewers, but Aqua responded to him.
"I told you it wasn't worth it," Kayden nodded. They just hunted and rotated around the place for the next few minutes. Kayden continued drinking the blood of each beast he encountered. His quest for power had no limits. Felix was already used to this, but for Aqua it was extraordinary to follow what Kayden was doing. Kayden decided only to drink the blood of those in the third and fourth realms.