This page is all about the Subzero planet on DBE:

This is the home to the cold blooded icers. Subzero has only two cities that can be found in this vast icey wasteland. Subzero Prime is a domed city where the main population of Subzero resides. Hidden below frozen forests and dank caverns is the mining town known as Berg City. Mining and smithing is one of the major sources of income for this frigid planet. Areas of interest are Rune Mines, Ocean of Ice, Shattered Ice Lab, Crystal Cave and Frozen Wasteland.