The Great Spiders, also known as the Spawn of Ungoliant, were a race of oversized and sentient arachnids that lived in Middle-earth, particularly in dark and perilous places affected by the power of the Shadow.
Giant Spiders were a sentient race of Great Spiders that lived in Middle-earth. They lived in the South of Middle-earth in the First Age, but by the Third Age they had spread to other areas. They were descended from the spider-creatures of the Ered Gorgoroth. Giant Spiders infested the great forest of Greenwood the Great after the shadow of Sauron fell upon it and it became known as Mirkwood.
Shelob was an "evil thing in spider-form...the last child of Ungoliant to trouble the unhappy world", living high in the Ephel Dúath mountains on the borders of Mordor. There are numerous references to her predating the events of The Lord of the Rings by many ages. Although she resided in Mordor and was unrepentantly evil, she was independent of Sauron and his influence.
This creature makes her first appearance in the chapter "The Stairs of Cirith Ungol", though she is formally introduced in the next chapter "Shelob's Lair" where the author says "But still she was there, who was there before Sauron, and before the first stone of Barad-dûr; and she served none but herself, drinking the blood of Elves and Men, bloated and grown fat with endless brooding on her feasts, weaving webs of shadow; for all living things were her food, and her vomit darkness". Her descendants include the Giant Spiders defeated by Bilbo Baggins in The Hobbit.
The Hobbit Bilbo Baggins, and his thirteen Dwarf companions encountered giant spiders in Mirkwood forest on their Quest to the Lonely Mountain. Only Bilbo's magic ring and an Elven blade (Sting) allowed them to escape being eaten.
Frodo Baggins and Sam Gamgee encountered Ungoliant's daughter, Shelob, in her lair as they were trying to enter Mordor during their quest to destroy the One Ring. Frodo was ambushed by the spider twice, and was paralyzed by her poison on the second encounter.[4] Sam used Sting to attack Shelob and wounded her, forcing her to flee the scene.[5] It is unknown whether she died from her wounds.
You are searching for one of these descendants of Shelob, from the spawn of Ungoliant. Hopefully, you will have your elven sward, or some other great weapon to defeat this attercop. You will at the very least, need a pen to sign the log.