Cold Marrow

A type of jade marrow that only grows within Ten Thousand Year Profound Jade. Extremely rare, known to be possessed only by the North Night Minor Extreme Palace. For demons, it can significantly reduce damage from heavenly tribulation lightning during their transformation, greatly increasing success rates. For cultivators, it is a top-tier auxiliary material for refining artifacts and pills. It is the main ingredient for refining the ancient secret medicine ‘Sun Return True Water’.