When you gaze upon this egg, it feels like you're looking into another world, another dimension that's very different than our own.
Terrifying and unknown, nobody knows what the Cosmomon is. Nobody knows what it is made up of. Is it energy? Is it dark matter? Is it from another universe in the multiverse? Is it from perhaps another timeline?
Cosmomons have the ability to hide themselves, presumably in another dimension, so it has been able to evade capture by the Science and Research Center in Ark City. They have never been studied and nobody knows if they ever will.