Heroic Maps: Deep in the Bleached Lands, far from civilisation, foul gods and demi-gods made their home. Exiled there after the Mage Wars, acolytes and cultists soon followed and began to plague the land with their vile shrines and temples.
One such temple was the Altar of Corrosion, dedicated to some unknown deity. The air is thick with poisonous fumes, and acid pools around the shrine, burning away anything that comes into contact. Few now worship at the Altar, although many ancient spells mention it, and so each year travellers visit the shrine, hoping to find something other than an early and painful death.