Void Prisms are structures created by Hybrid terminators

Serving as a type of anchor and portal linked directly to the void, they spawn Phantasms from energy. What forms the phantasms take largely depends on the nearest enemy unit or structure near it. In other words, if placed near a Protoss base it will spawn copies of protoss units. 

Special abilities:

  • Spawn Phantom - structure creates void shades dependent on nearby enemy forces