Source 2 (Ch.629)

"This is it, the water supplies directly into the shelters so there is no need to use this spigot." Atticus explained to Neveah as he came to a stop a short distance away from where they had been standing.

"Elle, fill up a bucket." Neveah instructed Estelle who had been quietly following behind them.

Estelle complied without hesitation, placing a wooden bucket underneath the spigot, she turned it on and the water flowed swiftly into the bucket.

Neveah glanced down at the running water, her eyes narrowed slightly as the small wooden bucket underneath it was filled up.

As the water level in the bucket grew, Neveah caught sight of it once again. The strange black and thin substance swirling around in the water, looking like thread strands.

However, they quickly disappeared after only a moment, leaving Neveah to wonder if they had ever been there.

The bucket was soon filled up but Neveah just continued staring at it as it overflowed.