Oh No! My Wife Is a World-Destroying Demon Lord!

[Invincible + mindless power fantasy + the wife is truly invincible] I, Chen Nuo, was reborn in a fantasy world and spent twenty years cultivating hard just to reach the Foundation Establishment stage. I married a gentle, virtuous woman who always said she was at the Golden Core stage and told me to protect her well. I thought we'd spend our lives together in simple, peaceful happiness. Until the day an Old Ancestor at the Nascent Soul stage came knocking, demanding I hand over a treasure. I gritted my teeth, stood in front of my wife, and prepared to fight to the death. But she gently pressed a hand to my shoulder and sighed. Then she flicked a finger. A thousand miles away, that Old Ancestor's sect vanished, mountains and all. I turned to look at her, frozen stiff. She smiled shyly and lowered her head, twisting the hem of her clothes. “Husband, actually...” Only later did I learn that-- She had casually slapped the Demon Venerable to death. An ancient forbidden land had been her backyard walking path when she was young. She used immortal treasures from the celestial realm to pickle vegetables. And the wife I worried about every day, making sure she had enough to eat and warm clothes to wear, was actually... A world-destroying demon who could shatter three thousand worlds with a single slap. Now she curls up in my arms every night and softly says, “Husband, the outside world is so scary. Hug me.” I hold her, my hands trembling a little.