Human Illusion

Human Illusion is a passive buff rewarded inside the Escape from Durnholde Keep and Culling of Stratholme instances in the Caverns of Time. This buff is active for all Horde races as well as Night Elves and Draenei. It makes characters with it appear as a member of the human race. Your existing gear does appear on the human model.

Before patch 4.0.6, Worgen were affected by Human Illusion. It no longer affects them because it prevented the use of Running Wild.