Within a week, the environment inside the cave had changed. Many different types of plants with Shadow Energy started to grow there. The beasts inside didn't know what was happening, but they were happy to be able to absorb a larger amount of Shadow energy. Rishi absorbed a large amount of it inside his core.
He didn't do anything for three days, then surveyed the area. Every Beast there knew that this human had done something to increase the Shadow energy. Rishi found some Beasts that were in the middle of evolution. He helped them by using his Shadow Energy and 'Rune Crystal.'
It would be good for him if these Beasts became stronger. As more time passed, the Beasts became friendly to him. His charm's effect increased the more time he spent with the beasts; slowly, they started to consider Rishi their friend. The effects were multiplied due to his higher Affinity for the shadow element.