Low-Fantasy Occultist Isekai

[Corruption's Bane] proved more than capable of reversing the damage caused by the Footman, and once its miasma was thoroughly cleansed, Nick was able to direct it at the demon itself.

Eerily, it emitted no cry of pain, nor did it appear to suffer at all, though it was hard to tell, given its lack of facial features and already grotesque body.

The demon kept chasing him, with each step getting slower and its strikes a little weaker.

Compared to the exorcism Nick had seen Marthas cast, it wasn't very impressive, but it was working, and more importantly, it wasn't draining him nearly as much as expelling the demon with his own mana would have cost him.

After several minutes, Nick finally stood victorious over the defeated demon and was able to bring to bear his full strength, crushing the abomination back into the soulless void it was born from.