- "Tsono-Xuhil! Mother root, father stone—grant me your strength!" —Tree-Minder Na-Kesh
Tree-Minder Na-Kesh was the Tree-Minder of the Xit-Xaht tribe and a skilled alchemist. She was obsessed with returning Black Marsh to the pre-Duskfall way of life, and made use of her mad Hist's tainted sap to this end.
The psychotic Hist of Mazzatun, Tsono-Xuhil, does not possess ordinary sap. It instead weeps an ominous substance known colloquially as amber plasm from its bark, which drives those who ingest or bathe in it mad. Na-Kesh performed cruel alchemical experiments with the amber plasm, and it was through these experiments that she was able to harness the power of the substance. She manipulated the plasm in just the right way to enhance a Saxhleel's speed and strength, and did so to herself.
She planned on distributing a brew made of the mad Hist's sap to the whole Xit-Xaht tribe so they could ascend, conquer Black Marsh, and eventually take all of Tamriel. She was defeated in 2E 582 by the Undaunted, just after the Xit-Xaht raided the village of the nearby Su-Zahleel tribe and enslaved its inhabitants.
- For game-specific information, see the ESO article.