Weurmoth
From Tardis Wiki, the free Doctor Who reference
Weurmoths – contracted from their chant and call-sign "we are behemoths" – were regen-inf troops engineered by House Mirraflex into field-carriers for other troops. According to The Book of the War, each one had the mass of an elephant, the firepower of a battalion, and the stubbornness of a mule, which limited their effectiveness in the field, a problem exacerbated by the physical instability imposed by the inverse-square law.
Mirraflex later used the weurmoths as a template for their Timebeast Assault on the City of the Saved. (PROSE: The Book of the War)