Unlock a Wellspring of Knowledge
This supplement presents an inexaustible source of new rules for your game. Inside are ideas, options, and alternatives to the standard D&D rules you can choose from to fit your campaigns style of play. From variant classes, races, feats, and abilites to alternate spellcasting systems, combat and campaign options, Unearthed Arcana offers a tremendous array of material to explore.
—from the back cover of Unearthed Arcana by WotC