This note seems to be fashioned from the flattened cap of a rather large mushroom. The ink glows faintly blue on the off white page.

To the one who continues to burn the plants within.

Your efforts are commendable, with each passing day the burned plant matter which you so graciously leave behind, fertilizes and nourishes the sandy soil within the cave. Soon I have no doubt that your efforts will lead to a lush and fertile oasis as the Underdark has not seen in ages.

If you wish any further knowledge to help you in your gardening efforts, please contact me here.

Oona.

And another notice is placed beneath, carved in heavy Zurkh:

Caverns now also under the watch of Clan Mithrilsoul. Those with intent to harm or destroy will be slain or maimed.