Slaughtering the Myriad Worlds

One day in 2199, a space-time wormhole suddenly appeared above Earth, and a group of characters from video game worlds arrived on the planet. With a single palm strike, they could overturn mountains and seas; with one sword stroke, they could cleave through the sun, moon, and stars; and with a snap of their fingers, they could destroy heaven and earth. What will become of humanity now?