Aberration Wild Shape( Lords of Madness, p. 178)
Most druids detest aberrations and think of them as outside nature, but some view them simply as examples of nature from an extreme and alien world. Thanks to your heritage, you are one of these latter, and have learned to channel your inhuman bloodline into your shapeshifting power.
Aberration Blood (LoM) , wild shape ability,
You can use your wild shape ability to assume the form of an aberration. This otherwise functions identically to your normal wild shape ability. The size of the aberration is limited by the size of animal you can normally assume the shape of with wild shape.