Ancient Assimilators Vespene Gas is automatically harvested from Ancient Assimilators without requiring Xel'Naga Precursors. Passive ability. v • e Usage Copy and paste the following into the article and fill in the fields. {{CoopZeratulAncientAssimilator}} Categories: StarCraft II protoss ability boxesStarCraft II Allied Commanders ability and upgrade boxes Community content is available under CC-BY-SA unless otherwise noted.