The Stargate is a unit producing structure for the Protoss, responsible for producing most of the Protoss air units. It requires a Cybernetics Core before it can be warped in. The Stargate produces the Phoenix, Oracle and the Void Ray, and after the Fleet Beacon is completed, the Stargate can also warp in the Carrier and the Tempest. The Stargate is one of very few structures that displays a distinctive animation depending on which unit is currently under production -- this means that enemy scouts are able to see what type of unit is about to appear.