I understand in common Cosmic Horror stories eldrich beings are terrifying because they don't care about our puny lives and world and could destroy us without really trying, but I am going for a kind of Lovecraft Lite story. One of the gods decided long in the early ages of my verse to rebel against the main god, resulting in a war between all of the gods. In the aftermath of this cosmic war, these gods fall from full blown godhood (but are still damn powerful) and become what are referred to as the Dead Gods. Only one remains, and he is like Yog Sothoth level. The one god who rebelled tries to regain his full godhood to stand against the main god once again, and has attempted to turn a few space species into mages (and magic is the only way to truly stand up against one of these gods in my verse) so he can use them as soldiers and acolytes for returning him to his power. He has failed several times, one time he succeeded and unlocked magic abilities in the whole population of one planet, attempting to fight his rival gods but failed (this is important, as part of my story is his son, with one of these aliens, was killed in battle, but is revived on earth and the protag must fight him). Anyways, I don't want to ramble. In final detail, this god has a son with a human woman on Earth, and the other Dead Gods and most powerful god come to know about it. Whats could make them want to avoid destroying Earth? Or maybe, more impossibly, make them not want to attack it directly?