Reborn in the Frozen Apocalypse: My Miniature Doomsday Shelter

"Reborn 3 days before the Ice Age. My backstabbing best friend immediately stole my Magnifying System, thinking she'd rule the apocalypse. She left me with the 'useless' Shrinking System. Little did she know, while she starves with giant, empty boxes... I shrank a whole supermarket and a farm into my secret bunker. Time to enjoy the show."