Talk:Hard Mode/@comment-41.164.20.21-20121024165742/@comment-4674838-20121025053716

Generally speaking, Hallow and Corruption behave the same, neither one goes through the other under normal circumstances. There are some special cases though, like Corruptors are a monster that could cause Corruption to go through Hallow (if you somehow lured one of them into the Hallow), and there are items such as Holy Water and Unholy Water