Discovered
This conversion was slow, and while it was happening the light green mist seemingly moved away from the gray smoke. Creating an area where no mist was present next to the gray smoke. Looking around Eldrian found that this was happening in a lot of places.
However, it was not to such an extent that his vision was covered. Instead, it was more that there was this gray smoke every ten or so meters.
It was also inconsistent in its appearance, size, and location. Sometimes there would be none for over a hundred meters, other times an area would be nearly full of gray smoke.
However, the smoke never formed a miasma. It was always disconnected, limited in size. Clearly, it was not actually the corruption, but rather individual cases where something had happened. Something which left behind mana which fed upon the mana of the nature element.