Slaying Demons: Starting with Upgrading my Calligraphy

Qi Xiu has transmigrated into a world where kingdoms are in chaos and demons are wreaking havoc. As a mere scholar, he by chance obtains a golden finger, which acts as a proficiency panel. For example, when his calligraphy reaches a certain level, he could write words that have impressive power."Oh, by the way, don't go out at night for the time being. I'll have a house servant prepare a chamber pot for you. Sleep early, bolt the door well, and if someone knocks, ignore it."The next morning, Qi found that the "Suppress" Character that had been pasted on the door last night was still there. But most of its ink had vanished. Less than a fifth of it remained!It seems something really did come last night. It was just that the power of the "Suppress" Character kept it out.