Thousands of Tonberries riding on thousands of Malboros being airdropped by thousands of dragons onto people i don't like.
Meanwhile Chaos, God Of Discord, the Emperor Of Hell, the Cloud Of Darkness, Zeromus, hatred incarnate, X-Death the evil tree, Kefka, God of magic, Sephiroth, the One-Winged Angel, Ultimecia, she who makes time her bitch, Kuja, the Angel Of Death, Sin the Eldritch Space Whale, Seymour the Genocidal Ghost, A ton of Cie'th, several Fal'cie, Almighty Bhunivelze himself, and a whole lot of other FF villains and random encounters or bosses all converge on centers of human evil all over the world in a giant orgy of FUCK YOU!
While this is happening hundreds of thousands of Heartless, Nobodies, Unversed and the entirety of Organization XIII make a beeline for various Captain Planet villain HQ's or military bases sworn to defend them.
Then thousands of Covenant and Flood join in the fun, alongside thousands of various types of zombies and the entire Resident Evil Tyrant line up, including such big names as G or Nemesis.
Then Devil May Cry demons start popping up and join in.
Then Craptons of Diablo 3 and Grim Dawn mooks and bosses also join in on the fun.
Then the Grox empire of Spore hovers ominously in orbit just to drive the point home, not that they are even needed at this point.
Also, Necromorphs, lots of them.
Path Of Exile monsters by the fuckload pop in to put the hurt on some scumbags.
Pretty much every single foe you can kill in various DND computer games, like the whole Baldur's Gate series and Pathfinder: Kingmaker. This includes Jon Irenicus, Demogorgon and a number of others on a similiar level.
Several hundred Mechwarrior mechs go stomping.
Tons upon tons of Disgaea demons appear, led by Tyrant Baal.
And a whole lot more.
RIP human civilization, your tattered remnants has a new god now. One with very little tolerance for the bullshit you are oh so fond of.
Then conquer the universe.