Mux is a corrupted form of murex occurring after removal from a murexian creature. It loses most of its previous value, turning into a highly toxic substance.
Mux can be found in marshes, streams, and other bodies of water throughout the Ashen Scape.
Murex turns into mux within 1d4-1 hours of being extracted from murexian creatures (minimum 30 minutes).
Mux is shelf-stable.
When raw murex breaks down into mux, it loses its potential usefulness as a dye due to its high toxicity. Some alchemists have been able to use mux as a toxin for poisons.
A vial of mux can be processed with a poisoner's kit into 5 vials of mux poison with a successful DC 10 Intelligence check. On a failure, the mux is rendered inert.
Mux exposed to open air emits a harmful vapor within a 20 foot radius. Creatures that start their turn in the vapor must succeed on a DC 15 Constitution Saving Throw or be Poisoned until they leave the area of the vapor. Sealing the mux within an airtight container also ends the effect.