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Mythic: Sire Denathrius
Defeat Sire Denathrius in Castle Nathria on Mythic difficulty.
Defeat Sire Denathrius on Mythic difficulty in Castle Nathria to earn the Sinbreaker title.
Enter Castle Nathria on Mythic
Travel to Castle Nathria and enter the raid on Mythic difficulty. Defeat Sire Denathrius, the final boss of the raid.