[@Andreyich] What exactly is the difference between normal steel and holy steel if I may ask?

Do they quench the armor plates in holy water to harden them? Or do they place purity seals over it and burn incense every night to cleanse it from Chaos corruption? Does it mean you have to use up one of your 3 magical item slots to attunie it? If so, is it at least a +1 armor? :lol