Corrupting an item locks it for further modification, but have the chance of greatly improving the item.
Corruption outcomes
Touch of Nyxxorith: All affix values are randomized within their own tier, and then multiplied by 0.8 - 1.2.
Touch of Thal’Zaroth: All affix tiers are set to the same tier already on the item.
Touch of Vaelthune: All affix values are set to the highest value within their tier.
Touch of Kryszalith: Implicit value is doubled.