Kyle knew that the 'Sprite' was not a normal one. In fact, Sprite was probably not even the correct name for the beast that had been born out of a fraction of the Mana stone deposit's Essence.
He had actually no idea how it was possible for a lifeform to be created out of the purest form of the Mana Stone deposit.
However, that was not actually important right now.
The important facts were that the Sprite had become one with the rest of the Essence it had been separated from due to unknown reasons, that the Essence had disappeared, and that the Sprite had entered an evolution-like state.
The cocoon that shrouded the Sprite indicated that it was 'evolving', or in this case, undergoing changes by becoming a complete existence.
It put the Sprite to sleep, which gave Kyle and the others the opportunity to start mining with far more strength than before.