Xanathar's Guide to Everything

Xanathar's Guide to Everything is the first major rules expansion for fifth edition D&D, packed with player and DM options. It introduces 25+ new subclasses for every class in the Player's Handbook, new spells, racial feats, and tools for character customization, plus extensive DM resources including encounter building, traps, downtime activities, and naming tables. Framed as the notes of the paranoid beholder crime lord Xanathar, it remains one of the most useful expansions in the line.