Here is my problem with reading the flavor text in order to try to find the item. We would not know the flavor text unless the item had already been found. The only way we know it is because of data mining. Seems like a backwards way to start a search. Granted, it is possible that the flavor text is descriptive of what has to be done to achieve the item. But, I see the flavor text as something that describes what it is and possibly part of how the skin is found. It may only describe the final step of how the skin is unlocked, which means it may have nothing to do with how to start the process of acquiring the skin.
With 1000s of players exploring content every day it is either extremely well hidden and off the beaten path, or it is behind timed content like the class hall abilities, missions with ilvl req for champions, etc., that no one has had the time to achieve yet.