The Ravenous: Eye on Dark Sun
By Rodney Thompson Magic brought the world of Athas to ruin and transformed its gluttonous wielders in ways both great and terrible. The successful spellcasters among the power-mad gorged themselves on arcane lore and evolved—first into sorcerer-kings and then partly into dragons. Other dabblers in the arcane that succumbed to the temptation of easy power suffered more dire consequences. For these unenviable souls, defiling magic became a part of their being; far from raising them to new heights, it warped them physically and mentally into something debased—and ravenous.
WotC Dungeon Dark Sun Article (Subscription to DDI Required)