Avernus

Avernus is the first layer of the Nine Hells in Dungeons & Dragons lore, depicted as a chaotic, war-torn battlefield filled with fire, smoke, and demonic conflict. It serves as a battleground between devils and demons, with rivers of lava and ruined fortresses. Avernus functions as a starting point for many adventures involving infernal forces, where evil entities make deals and plot schemes. Its environment reflects chaos and destruction, making it a dangerous, tumultuous realm for those who encounter it in the game.