It wasn't too surprising for Klaus to recognize every last one of the five beasts standing before him.
After all, he had recalled more of Efad, his 9th incarnation's memories, from what he learned about the multi-dimensional Cube. Aside from having the ability to know every last beast, he also discovered that it could be used to identify their evolutionary path.
It became a boon for him, as he could now see more of the path a beast or monster would follow. It wasn't like he cared too much about that, though.
He only focuses on that aspect after they evolved, once using his blood.
So, seeing them stand with their terrifying auras, Klaus knew he had scored something good once again. Five of them stood before him, looking menacing.
This meant that with his blood, they would become even more impressive.
