Read the first chapter. Maybe you will like it. ;)
"I understand the control part," Rifindio took a deep breath before saying. "I could even accept the 'merge' part, although I don't know if such a thing is possible. However, eat? How can you eat space?"
"Even if you ask me, I can't give you a definitive answer," the Abyssal Soul spoke. "Abyssal Beasts are born with this innate ability. In the same way you ask me how I can eat space, I can ask you the opposite. Why can't you and the other races eat space? It is just natural for us. We are born of space itself."
Roan pondered a bit and didn't feel it was too ridiculous. Many races weren't born through reproduction, especially spirits. A very big part of them was born of the conditions in the environment they live. There was also the Essence Race, which was born from Essence Energy. It's just that Essence Energy is several times rarer, and so is their race. Huban was such an example.