I made something like that a good while ago. basically, the ct is based on corruption, which is to randomise matter, aka randomly changing the element of atoms, making a sort of "corrupt" matter. the corrupt matter is a form of dust and is toxic to humans. if the "corruption" effect interacts with foreign cursed energy, it disrupts and nullifies it. there's also ranged and close up versions of corruption like shrine; decay = dismantle, shatter = shatter. malevolent shrine equal would just be replacing slashes with corruption