The Eternal Sanctum Key is a key item in Dark Souls II.
- Key to the inner chamber of the Eternal Sanctum.
- The Sunken King erected the Eternal Sanctum to shelter Sinh the Dragon.
- The Sanctum appears to be a solemn temple, but it is filled with devilish creatures that ensure no trespasser shall cause offense.
Found on a corpse in the same chamber where seven Sanctum Knights' statues dwell in the Dragon's Sanctum.
Opens the door located at the entrance of the Dragon's Sanctum, shortly after the bridge where Sinh burns two Sanctum Soldiers.