Tormentor Heavy Grav-Tanks

In most respects, the Tormentor is similar to the Slayer. It shares the same chassis, as well as its ability to carry a trio of deadly Razorworms into battle.

Possibly even more terrifying than its predatory cargo is its repulsive weapon system. The shocking acid streamer spurts an appallingly noxious substance, which can degenerate biological matter to mire in microseconds. This is disgorged from a flexible trunk, allowing the substance to be injected into buildings, where it quickly sublimes into a lethal gas. In this way, it is able to root out infantry from the very depths of structures, meaning that there is no place to hide from its horror. It is probably more feared by the humble infantryman than any other weapon.

Rules for this unit can be found in the Core Rulebook