Lying Flat from the Start of the Apocalypse, the System Begs Me to Save the World

[Laid-Back Immortal Emperor × Pitiful System × Imaginative Saintess = An Unconventional Apocalypse Blockbuster!] Ten years into the apocalypse, the sound of zombies gnawing on bones is Ye Xuan’s tea-time background music. The System kneels and wails: “Host! Please, just clear the area with a snap of your fingers! I’m begging you! I’ll trade all the points for Longjing tea!” Ye Xuan blows the tea foam from his rough clay cup. “Shh, I’m watching the show.” Until one day The saintess of the cultivation world tears through the sky and crashes into his living room. Seeing the zombies strewn everywhere, her eyes widen in shock. “Is this the Demon Realm of No Return?!” Ye Xuan lazily pushes a cup of tea toward her. “Need something to calm your nerves?” The saintess stares at the zombie brain matter still clinging to his fingertips. “Demon! You’re planning to cook me!” The System suddenly springs back to life: “Ding! Bound a Golden Core-level errand runner. Reward: "The Immortal Emperor’s Basic Breathing Technique"... (The name’s lame, but it’s godlike!)” And so, the wasteland’s whole vibe gradually falls apart He wipes out the base boss trying to steal supplies with a flick of his finger, complaining that the smell of blood will taint his tea. He erases a zombie horde with a snap, then turns to the System and asks, “If the snacks die, do I get a cleaning voucher?” Clutching the “basic” manual, the saintess trembles. “You call the Heavenly Dao’s celestial music an introductory technique???” When invaders from another world descend with a roar Ye Xuan rises from his wicker chair and draws the rusty iron sword from the well. “The tea’s gone cold...” “...Then let’s warm up the world.”