Hopon-Di is the name of the second largest moon orbiting the plantet Hopon (Di meaning 2 in naxxu). Being an ice planet covered by a 2km layer of ice, the planet is considered lifeless. However, the clamonians discovered that under the ice surface, there was a large ocean in witch they built a hidden base in case of alien threats.

During the war with the esiri, this was the hiding place for the last of the clamonians.