Future fantasy

It's 2358, the world ended in nuclear fire in 2032. However, instead of all life dieing on the planet, things changed. First, fantasy creatures showed up. Dragons, griffins, wyverns, behemoths, etc. At the same time magic flooded the world. Then dungeons started appearing. Some as small as a goblin cave, all the way to the biggest one recorded in what was dallas/fort worth, which sank deep into the earth. Only 150 floors have been mapped and Noone found the dungeon core. Then all fantasy races came, from the normal like elves and dwarves, to the imaginative furry races, to the monster races. All governments dissolved during the nuclear bombardment, and humans are no longer as vastly populous as they use to be. There is a central government ran by representatives of every race, but there are alot of areas the government doesn't reach. Now daily lives are governed by classes and level, like you'd find in a fantasy setting. Good luck.