You can purchase the Void Gates in the Privateer Press Store.
Unit Faction and Type
1 to 5 Arc
# of Arc on the model
Void Gates were released during the Warcaster: Neo-Mechanika Kickstarter.
Though humanity has only the barest inkling of the true scope of the vast planetary networks of void gates created by the Architects, human Warcasters have mastered tactical void gates as weapons of war. Few technological developments have redefined conflict so completely. When placed for greatest strategic advantage, void gates are among the most potent and unpredictable tools in any Warcaster's arsenal. They allow for the rapid deployment of forces from the Warcaster's reserves to react to enemies' movements or to open new fronts at will.