Clan Moulder are the flesh-shapers of the Skaven, breeders and vivisectionists whose packmasters drive howling monsters to war on chains of barbed iron. From the reeking fortress of Hell Pit in the frozen north, they supply the Skaven with rat ogres, giant rats, and abominations that should not draw breath.
The clan's fleshmoulders splice warpstone, sinew, and stolen limbs upon their operating slabs, remaking captured beasts into shrieking weapons. Nothing is wasted and nothing is spared; failed experiments are simply fed back into the breeding-pits to become raw material for the next horror. The greatest of these creations, the Hell Pit Abomination, is a mountain of grafted flesh that not even its handlers can fully control.
Moulder's wealth is measured in living stock, and warlords across the Under-Empire pay dearly for its monsters. The packmasters care little who wins their masters' wars, so long as the slaughter sends fresh corpses and captives back to Hell Pit's ever-hungry vats.