This mod adds the Stalker, which will only look at you from afar. Get any closer and it becomes a Wrathful Stalker, and charges towards you. You have to make warding sigils to make him disappear, or if you have the right materials, you can make a stalker totem to make it passive towards you. You can even make a stirrup to mount it, just make sure to have that totem. It also adds wardstone and engraved stone, used for various items interacting with the stalkers.