- Alignment: Neutral Good
- Portfolio: Knowledge, Prophecy, Skill
- Domains: Artifice, Good, Knowledge, Magic, Rune
- Favored Weapon: Heavy Mace
Ioun is the goddess most often worshiped by wizards and scholors. Many wizard colleges are dedicated to her name. She is also the second most revered god among mettalic dragons, just after Bahamut. Her temples are repositories of knowledge, and often they look more like libraries then places of worship. Ioun is allies with Corellon, Erathis, and Pelor. She is the sworn enemy of Vecna who seeks to undo her work of sharing knowledge freely.