User can purify anything/everything, including natural forces, abstract/conceptual properties, people with dark hearts and souls, users of Corruption Inducement, even things that by the definition, immune to or shouldn't even be able to be purified (such as infernal entities or demonic powers) would be affected, and etc. Due to the nature of the purification/purifying influence, all attempts at corrupting the target would either fail or lead to an eternal stalemate.