After Karsha accepted the five shadow guards as his personal protectors, they returned to the cave where he had awakened a few days ago after leaping into the waterfall to escape the Scalecrusher Titan snake. Now that he had five Tier 7 beasts as his guards, he no longer wanted to hold back. With one day left before their tasks began, he decided to bestow some skills upon the five snakes.
At the start of their campaign, Karsha had instructed them to keep their skill books. Initially, when they told him they couldn't learn skills like humans, he understood it was because they relied solely on their instincts and did not embrace new methods. They could only learn skills they acquired themselves, meaning they could only learn from skill books dropped by monsters they had killed.