A surging underground river flowed past this spot.
Bursting forth from a massive cavern, it then disappeared into another on the opposite end.
Elvis's seal was located amidst this dark cavern's underground river.
It took full advantage of the terrain and exploited the vampire's weakness—the affliction from running water.
A vampire caught in the river was like a human immersed in strong acid, constantly suffering from acid burns, no less than being exposed to sunlight.
The mere existence of this underground river was troubling for the vampires.
They couldn't enter the water, and couldn't even touch the true form of the Divine Child, Elvis.
They had thought of blocking the source of the underground river to stop its flow.
But the river's surging power was beyond imagination, so wide and deep with such a swift current that, with their abilities, they couldn't come close to blocking it.
They sent enchanted, humanoid creatures to investigate.
