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.
Eagle (Middle-earth)
Different adaptations of Tolkien's books treated both the nature of the Eagles and their role in the plots with varying level of faithfulness to originals. The first scenario for an animated motion-picture of "The Lord of the Rings" proposed to Tolkien in 1957 was turned down because of several cardinal deviations, among which Humphrey Carpenter recorded that "virtually all walking was dispensed with in the story and the Company of the Ring were transported everywhere on the backs of eagles".