New Indy World of Darkness
Banishers are similar to Mages in that they are able to see and pull power from the Supernal Realms. That is where the similarity end however in that as opposed to a mage who might feel a sense of understanding or relief or naturalness from magic and wielding mana a banisher feels revulsion at it’s unnaturalness. How it is explained is up to the individual banisher or cabal. Try to end magic and occasionally other supernatural threats as they view them as an unnatural existence upon reality.