Leshen mutagen is an alchemy ingredient and is used to craft Leshen decoctions. They act like lesser blue mutagens when placed in the diamond-shaped slots in the character panel.
- In an undocumented change for Patch 1.08, all mutagen icons were changed. However, there was still a bug for those on Steam and Origin that didn't reflect this and was later fixed in Patch 1.22. Despite this, some may still see the original icons instead, even with a fully patched game.
- There is a leshen guarding a treasure northwest of Aeramas' Abandoned Manor.
- A mutagen can be obtained from Kernun.
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