Adam vs the Apocalypse [Progression, LitRPG, Sysapoc, OP MC]

What is true power, if not that which can protect those who need protection? Adam had left everything behind. His brother, his empire, and System space entirely in a gamble for peace. He had found a small, mana dead universe at the far fringes of reality, and made a life for himself in it. He had made a new life, a family, and a surprising amount of happiness in the mundanity of it. With that new life came the pains of mortality. His daughter had been diagnosed with an aggressive form of cancer, and there was nothing he could do to help. No longer could he cure her with magic, instead he was forced to watch her suffer through unsuccessful treatment after treatment. And then for the third time in his long, long life, everything changed. It shouldn’t have been possible, but that didn’t matter. It was happening anyway. The System had found them. An apocalypse had reached Earth, and he wouldn’t waste this opportunity. With the runic blade humming back to life, Adam had a chance to save his daughter's life. He would not fail.