When the eggs of subterranean Wollywogs hatch, it only makes sense that a pale-skinned, red-eyed Subterranean Wogpole would emerge. These are no different than Wogpoles above the surface, except that they may shine luminous and blue in the dark, making for a truly mystical and alien world while exploring underground. This also may serve as a warning that wollywogs lurk nearby, hidden out of sight.