Ice Age: It Starts with Bringing the Sister Downstairs Home

[No rebirth + no time travel + no cultivation + no aliens + no super powers + Gou + technology + farming] The Great Ice Age is coming, global temperatures plummet, and the world is plunged into a period of ice! Good news [Congratulations on getting the doomsday system! Bad news [You have no superpowers, no system space, you can only survive] What kind of love is this? Skip it! What knife to sharpen? I have the Equalizer M134. Sister, are you convinced? My sister said that I was not convinced and would fight another 300 rounds.