This article contains spoilers for Baldur's Gate 3 and the Baldur's Gate: Descent into Avernus adventure module for Dungeons & Dragons Fifth Edition.Baldur's Gate 3 takes place in the Forgotten Realms, one of the most popular settings for Dungeons & Dragons adventures. The Forgotten Realms' cosmology contains hundreds of planes of existence, some of which players can visit in Baldur's Gate 3, but few are more dangerous to mortals than the Nine Hells.