Vault-spire
this was the Basic translation of the Muun term that described the cities that formed around the cones of active smoker volcanoes on the planet Muunilinst. Despite their name, these cities were primarly equipped to mine and process the valuable ores and minerals that were spewed out by the smokers. The actual vault was the smoker itself, a cone composed of gold, silver, platinum and other metals that was covered with all manner of aquatic life.