The Castle is the central structure of any larger Tzan settlement. Resources can be dropped off here and it trains builder units. The Citadel is also armed with a large crystal on top, which rotates and fires beams of strange particles at enemies over long distances. Unlike many other factions, the Tzan have no MCV - upon the start of a match, the Citadel will either be in place, or it is "dropped" to its location as the match starts. Additional Citadels can only be obtained via the "Summon Citadel" ability.