The Sea of Silt is home to a dormant beast of great
elemental power known as the Dust Kraken, Ul-Athra,
or the Mouths of Thirst. It is said that the fearsome silt
horrors that hunt in the sea are the spawn of Ul-Athra.
Did the creature come to Athas during the Red Age and
turn the original sea to dust? Was it a native of the sea,
changed along with the water by defiling magic? No one
knows. Over the centuries, a number of elemental cults
have risen to worship the Dust Kraken, seeking to rouse
the beast from its slumber and use its power against their
enemies. These cults perform strange rites in the name
of their god. Sometimes, those especially favored by UlAthra's dreaming awareness are rewarded with secrets of
powerful elemental magic or vile rituals that summon and
bind lesser avatars of the Dust Kraken.