The Yuan River flowed up from the south. Just before Heavenly Scabbard Mountain, a sandbar suddenly rose in midstream, its soil entirely black, its shape like a snakehead fish.
In feng shui topography, this was called "yin fish in dead water."
The fish's mouth lay at the northern end of the sandbar. The river's baleful dead water spewed from the Yin Fish Mouth was delivered to Heavenly Scabbard Mountain. The river turned east, but this baleful deathly energy was sent up the mountain.
Heavenly Scabbard Mountain's Dragon Vein was a coiled dragon. Its tail began in the south, connected to the Wu River, and ran north before turning east and then south again.
After circling Heavenly Scabbard Mountain, its head pointed south once more, directly toward the Yin Fish Mouth.
The Dragon Vein swallowed the river's baleful deathly energy, drawing it into the mountain within its belly to nourish a million Living Corpses. This was the configuration known as "the wicked dragon swallowing yin."
Along its length, the coiled dragon sprouted claws that reached into the surrounding mountains, plundering their earth energy.
Heavenly Scabbard Mountain was encircled by the coiled dragon, with an opening only to the south. Here, however, the Wu River flowing from the west had scoured the mountain's southern side into sheer cliffs, where countless hanging coffins condensed corpse miasma.
On rainy, overcast days, the thick corpse miasma turned into freezing dew that dripped into the Wu River, then was carried into the Yin Fish Mouth to nourish the yin fish's growth.
The yin fish in turn drew Yin Baleful Intent and deathly energy from the Yuan River and the Earth Veins, sending them into Heavenly Scabbard Mountain's Earth Veins.
This was the configuration of utmost yin formed by Heavenly Scabbard Mountain and the interdependent waters of