Unlock the Sarcophagus in Ragnvald

Walkthrough
Explore Ragnvald. On the path to opening the sarcophagus, Saerek's Skull Key and Torsten's Skull Key will need to be found.

Unlock the Sarcophagus in Ragnvald
Use the keys to open the sarcophagus to then confront and defeat Otar the Mad and take his mask.

PS4

 * The sarcophagus can also be opened by casting a destruction rune such as a Lightning Rune on top of the sarcophagus. This way damage is dealt to Otar before he begins his attack.
 * The archway will open.
 * Run quickly back up the stairs and use a flame spell such as Flame Atronach because undead creatures are susceptible to flames.