We learn’t a great deal from the ceph invasion which was terrestrial but was alien from M33 galaxy. The nanosuit and how it turned humanity from fragile to arrogant through ceph integration into our DNA which got enhanced through synthetic nanites. We stopped the invasion armies wanting to annihilate us, take over the planet. But with great sacrifices we turned their bioweapon against them and closed their space portal before any of them could arrive. But they were real! All these years hiding below surface while humanity evolved and got control of the planet. Their most formidable ability was of invisibility and absolute denial of their existence even with evidence. We broke that illusion and got hold of their tech killing the greatest threat to humanity, but we also inherited their property of absolute jealousy. Which only made Narus stronger against the slayer in years to come.