File:Coilfang Reservoir.jpg

Summary
Concept art by Trent Kaniuga.

This piece was included in Kaniuga's 2017 video Life as a Concept Artist - Art Tour The Burning Crusade. He spoke about it only briefly, saying, "This is 'Lady Vashj', which I think was called... 'Serpentshrine Cavern' is what it ended up being called in the final."

It can also be seen on his ArtStation: "World of Warcraft - Burning Crusade various environments 2".

Source
Scrolls of Lore, "Coilfang Reservoir"
 * Website
 * Image