After they hunted many psychic shriekers, they were able to pinpoint the location of the blood beasts. Even before they got to this location, the bait of the flesh of epic killers began to work because it was finally close enough to the targets to attract the targets.
The weaker blood beasts came to them, and they used these weak ones to find the stronger ones. So it was easy for them to find the blood beasts.
When they finally found the rank 9 blood beast that they wanted, they found that it was together with many other rank 9 blood beasts.
They knew why the blood beasts were congregating here after reading the memories of so many divine beasts. The reason was something that they could have guessed even if they couldn't read memories.
This wouldn't be the first time that something like this was happening. But they were still surprised by it because they didn't expect it to happen to blood beasts at all.
