Colossal Wild Shape
(Epic Level Handbook, page 52, DnD 3.0)
[Epic, Wild]
You can wild shape into animals of Colossal size.
Prerequisite
The ability to wild shape into a Gargantuan creature
Benefit
You can use your wild shape to take the shape of a Colossal animal.
Normal
Without this feat, you cannot wild shape into an animal of greater than Huge size.