The Emil clones are weaker than the original Emil. The clones used their self-destruct by overloading their fusion reactors. Seeing as thousands of weak Emil clones can pull that feat off makes you wonder how powerful the original Emil is or even Chaos form Angelus because Emil has her cells. In Drakengard 1, Caim defeated Chaos form Angelus in Ending C without a Dragon Bone weapon and being pactless. In Drakengard 2 who can crack open the earth and the sky with his fists, had to be sealed away by another god. In Drakengard, you also have these Seals that once all have been destroyed, the whole sky cracks and shatters so the Watchers and the Queen Beast can wreck havoc on the world. The Goddess Seal is described as the weight of the Time, Space and Dimension of the world that the Goddess carries on her shoulders. Furiae and Angelus endured the constant pain of the Goddess Seal after the other Seals were destroyed due to the Goddess Seal. It depends if Mashima confirmed...