At the Beginning, a Dog Signed in and Became the Wife of a Mythical Beast After 18 Years.

I have an old friend. She didn't leave me a protector, nor did she prepare any magic treasure that could reverse the fate of heaven and earth. She only gave me a system. Let me attack the Nine Heavens upwards and cut down the Nine Netherworlds, and be able to live freely in the world, without restraints or shackles. ——Qin Xiu