Cortana is a Sea Dragon boss along with Shimmer, Lucious, and Sylvian, who can be found in the Summer Festival 2017 zone. She drops Sea Dragon Tome (Twilight), Sea Dragon Glaive Staff (Twilight), Sea Dragon Sea Serpent (Twilight), Sea Dragon Robes (Twilight), Sea Dragon Horns (Twilight), and Sea Dragon Wings (Twilight).
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