Items known as 'Kraus-touched' were turned invulnerable by Kraus, either willingly or lacking intention. Any non-living object or material touched by Kraus's bare skin became invulnerable to destruction by mortal hands, but can still be destroyed by an Angel of considerable power.
A mortal touched by Kraus will cease aging and cannot be killed by mortal hands. Even if decapitated, their flesh will repair itself within a few minutes. Legend says those blessed by Kraus have a personal connection to him, and act as guardians of Eternia.