The beasts didn't just lose powers and source of gaining strength but also valuable knowledge that others didn't want them to know.
It especially happened in wars of Fifth Epoch which while not being on the same scale as Great Catcalysm War of Fourth Epoch, still did a lot of damage.
So, Kael was more patient and explained everything to the three of them. Surprisingly, there were a few things that even Rias didn't know so he gave them every bit of details he had gotten from Alpha.
He mainly covered the topic of skills as they were on it.
Skills were divided into a few types and they were Normal Skill, Unique Skill, Ultimate Skill, Elementary Skill and Unknown Skill.
Normal skills were those skills which could be used by everyone mainly as long as they had affinity with the same element. Sometimes, even that wasn't needed as the skills did their work.
