C2701 My Appearance Can Change

If the fruits and mushrooms bred by the snakeheads are seen as energy balls of another form, then what is the use of the snakeheads in this process?

If his speculation was correct, the basin required souls as a medium. Here, the snakehead monster could also be seen as a medium, but the formation of energy fruits. It doesn't consume its life, soul energy... This is a bit strange