The cowled acolytes entrusted with spawning vessels prowl the battlefield behind the front ranks, gathering corpses and flinging them into the waiting cauldron. Bodies splash into the brackish fluids to become part of the charnel reduction that sucks additions into its depths. Once the churning contents of the foul vessel have simmered sufficiently, a spawn leaps out of the cauldron, newly created and ready to sate its ravenous hunger.

The Spawning Vessel unit comes in a box (PIP 73085). A player may field one Spawning Vessel unit for each warlock in a Legion army.