@Meta Well, if I told you what dark energy is made of, what would be left for the scientists to discover? XD
I mean, everything I've put forth to explain his abilities, excluding the spirit realm which is based on make belief with no actual proof irl, are logically derived abilities from the properties and effects of different spatial phenomena. And for those that seem unexplained, I just stick an energy x/element x sticker on it that still hasn't been explained irl and call it done. For this case, I gave dark energy the properties of energy absorption.
A theory I'm just saying from the top of my head, super faulty probably. Maybe they absorb all other energies within them which causes the universe to expand. A percentage of radiation from every object is absorbed by dark energy which is present everywhere. The equation that we have developed to calculate the amount of radiation an object has in relation to it's mass and temperature is wrong on calculating the complete amount of energy it radiates. It only calculates the energy radiated
after the dark energy has absorbed a portion of it. This could be one of it's properties.