"Then, through the broken walls, they see the glow of a fire, and then the outline of a large cauldron sitting above it. As they creep nearer, they see the sledge pull up beside the cauldron. Two more cultists appear to join the three with the sledge in lifting bodies and dumping them into the cauldron."
"If a figure is in base contact with the cauldron it may spend one action to tip it over. The figure can use this action as an attack against any figure within 1" of the cauldron"
(Frostgrave. Thaw of the Lich Lord. The Dark Cauldron scenario. p.26 )
Cheers!
Anastasia.