The Void catalyst was a communication device used by the Tal'darim of Atrias inside the Temple of Erris. Through it, they could communicate with Amon. The device was destroyed by Dark Prelate Zeratul in an effort to disrupt the Tal'darim's command structure. Even after its destruction, Amon was still able to dispatch shadows of the Void through the device.



Blizzard Entertainment. StarCraft II: Legacy of the Void. (Activision Blizzard). PC. Mission: Whispers of Oblivion, Evil Awoken (in English). 2015-07-15.