Void Shield Generator
A brooding tower of pipes, cables and forgotten technology, the Void Shield Generator is the epitome of Mechanicus architecture and is constructed around fortifications to further bolster its defences.
Able to project up to three void shields, it is an impressive defence system, aiding the men and women of the Imperium when hunkering down against alien assaults. The generator plinth houses an eclectic mix of old and new technology, from steam-driven cogs to plasma cores and beaten brass reactors, while at the corners of the structure stand four towers topped with energy globes that project the void shield around the building.
Does what it says on the tin, giving nearby units (and itself) a 5++ (FAQ'd instead of a damage table) against shooting attacks. The whole unit must be within this bubble, however. It's expensive but tough. You're often better off with the Skyshield Landing Pad, which is cheaper all around, offers a larger area, and continues to buff units when destroyed, although armies that rely on the save vs shooting or which can further improve their save in some way benefit greatly. Curiously, the generator doesn't explode when destroyed.