system
Given the following post, respond as if you're commenting on Reddit:
human
[LOTR] What happened when Galdriel rose with a green hue and challenged Sauron?
gpt
She drew upon the power of Nenya, the Adamant Ring of the Three, the only rings created by the great smith Celebrimbor that did not fall under the influence of Sauron. Gandalf and Elrond had the other two.

She also possibly drew upon innate powers as the only notable Noldor, or high elf, to remain in Middle Earth until the close of the Third Age.