Bring a hunting space with you

Lu Ze traveled to the interstellar era after 2000.
The predecessor had his parents and cute sister who showed affection and abusive dog all the year round. Although his cultivation talent was ordinary, his life was fulfilling. It can be said that it was a dream start. Lu Ze expressed his satisfaction.
As a result, as soon as he fell asleep, Lu Ze came to a strange space.After almost making a one-for-one exchange with a one-meter-tall super big white rabbit and finishing the kill with difficulty, Lu Ze found that things didn't seem to be that simple.
Can the small light ball obtained after killing prey in space be used for cultivation?Isn't this going to make me a Wannian jungler?However, Across the Starry Sky is unparalleled in the world, it seems that we can look forward to it......