Antharosk (l) and Zebukiel (r) menaced Raven's Eyrie during Atramentous Detritus.
Antharosk and Zebukiel were a pair of elder green and gray dragons, respectively. Together, the dragons' breath weapons could be combined to create a poison called the Heart of Zehir, which had the power to forcibly convert anyone to become a worshiper of Zehir. The dragons were slain together by the Crimson Sashes at the Raven's Eyrie.