Long Dangdang's command to Little Evil was to absorb as much as possible during the next four hours and then return to the contract space to digest slowly. This was the most time-efficient method.
Seeing so many Grade A Soul Stones, even Little Evil's pupils dilated a bit, feeling genuinely like a rat that had fallen into a rice barrel, and it started to absorb with all its might without hesitation. For a magical beast, enhancing its level is a natural pursuit and instinct.