That particular Ultra Beast absorbs energy on an astronomical scale.
[CONT](VC):If you have a card named "Eye of Destruction, Zeal" in your soul, this unit gets [Power] +1000. [AUTO]:When a card named "Galactic Beast, Zeal" rides this unit, if you have a card named "Eye of Destruction, Zeal" in your soul, choose one of your opponent's vanguard, and that unit gets [Power] -3000 until end of turn.