Jon carefully studied the runic inscriptions. Protection against evil, dark magic suppression, and something that looked like it would most probably block any corpses from being raised as an inferi or any other form of undead. All of the defences were aimed against dark magic practitioners of some sort. Considering Winterfell was a keep with almost impenetrable walls, the seat of House Stark was very well protected. That is if the wardstone was fully activated. It had gone into slumber, keeping the magical defences running at a bare minimum. He pricked his finger on the tip of his bronze dagger and brushed his bloody finger across the surface of the orb.