The Death swamp is an area that formed around west and north Saor in many stages. During the last stage one of the most powerful liches was destroyed, but not what she had completed as work. As the lore goes the heroes marched and faced the lich as the armies of the dwarf empire and gnome kingdoms battled the undead an lichenous horrors she has summoned. In the end as the lich fell and the horrors retreated to the centre of the swamp an enormous bone spider appeared and killed the heroic party.
The expanse of the Death swamp receded over the centuries but the autumn and winter showers expand it.
The soil is the main ingredient for the much coveted death swamp glass