Avatars are divine servants of the Lords of Good that can summon celestials to aid them. Powerful avatars can even transform into celestials in combat, channeling divine energy directly from the Heavenly Host. Written by Hammer & Helm author and Dragon Magazine editor Jesse Decker, the Avatar's Handbook introduces this new core class to the d20 System and gives you all the rules you need to incorporate it into your campaign. In addition to Master Class trademarks like new feats, spells, and magic items, the Avatar's Handbook includes full game stats for over 25 new celestials, making it the perfect complement to Legions of Hell and Armies of the Abyss. Righteous paladins and clerics now have a powerful new ally in the struggle against evil.