Masking mud

Cold black mud from a seep in the Depths, still wet. Roll in it and nothing down there can smell you, Rex included. Sunlight bakes it useless, so it keeps only while you stay below.

How to get it

Scoop it: from a seep of cold black mud in the Fabled Depths, one handful a seep. It bakes into Sunbaked mud the moment you stand in daylight, and the bank will not take it. See Rex.