Sting (Middle-earth)
Sting has the magical ability to detect orcs or goblins nearby, glowing blue in their presence, as it did when the Fellowship encountered orcs in the mines of Moria. Tolkien establishes this as a common property of First Age Elf blades, particularly those forged in Gondolin. Sting is also exceptionally sharp. Bilbo manages to thrust it without effort deep into a wooden beam at Rivendell. Frodo also wounds a troll in Moria, after Boromir notches his own sword with his attempt. Sam uses Sting to cut through the giant spider Shelob's strong webs with ease, and also wound the spider, driving it away from the paralyzed Frodo.
Watcher in the Water
The Watcher in the Water is a fictional creature in J. R. R. Tolkien's Middle-earth legendarium; it appears in "The Fellowship of the Ring", the first volume of "The Lord of the Rings". Lurking in a lake beneath the western walls of the dwarf-realm Moria, it is said to have appeared after the damming of the river Sirannon, and was first recorded by Balin's dwarf company 30 or so years before the beginning of "Fellowship of the Ring". The origins of the creature are not described in Tolkien's works, but writers have compared it to squids, the legendary kraken, and even to Tolkien's dragons.