The phial provides clarity first, illuminating the space, and then protection and strength as Frodo decides to stand and fight. Frodo’s sudden speech in an elvish language implies that the phial channels some external and collective power of the elves through its wielder. As Sam almost conjured Galadriel with his vision, Frodo invokes her name while holding the phial. Despite the power of the voice speaking through Frodo, Shelob is ancient and unafraid.