Knar the collector (Kin-nar)

Every now and again, a mysterious door appears at random spots in the world, leading to a library-like place with webs everywhere and a fractured purple sky above. In the center of the open ceiling would usually be a spider, watching the visitors come into his domain from his web. Sometimes others may be there, reading the many books on the shelf or observing the artifacts he has in various spots of the domain. Like the Aracni (human-spider mix), he is capable of higher thinking, but unlike them, he is just a larger wild spider. When he descends from his web to speak to his guests, he speaks through telepathy, makes witty remarks, uses complicated words when talking, makes many historical references that many wouldn't understand, and always gives advice based on his assessment of the person's character.
Not much is known about this spider, as he is rarely seen outside his dimension due to his cautiousness when others could be around. It's not uncommon for him to give information to adventurers in exchange for valuables he is seeking, as he does not care for currency. He also occasionally mentioned some type of "experiment" that happened centuries ago, allowing him to do what he is able to do. Some speculate that the magical capabilities he expresses could be inter-dimensional travel, which would explain the access to such dimension, but not much is known about it. What many do know is that he goes by the name Knar, the collector, a collector of everything left behind. The doors to his dimension can only be opened by those who are "worthy", which he defines as people that will not harm him or his collection.