Apocalypse: I Just Awakened the System, and You Expect Me to Put Up with This?

【Apocalypse + Reborn + System + Stockpiling + Ruthless + No Saintly Behavior!】 Yang Dingtian wakes up in a world where the apocalypse has just begun! The apocalypse breaks out, and zombies run rampant. But Yang Dingtian awakens a System that makes him stronger whenever zombies attack him! “Ding! Host attacked by an ordinary zombie. Strength +1!” “Ding! Host attacked by a Level 1 zombie. Speed +5!” “Ding! Host attacked by a Level 7 Zombie King…” Watching the zombies attack him without tiring, Yang Dingtian's lips curl into a slight smile. “Come on, everyone, hit me harder!” So what if it's the apocalypse? My System has awakened, so mowing down enemies is perfectly reasonable, right? Food is scarce in the apocalypse? I have a spatial ability, so I can get as much to eat as I want! A saintly heart? That would only slow down how fast I draw my blade! With a System and a spatial ability at my side, tell me, how could I possibly lose in this apocalypse?