Curalmil

Curalmil is a Draugr boss in The Elder Scrolls V: Skyrim. Protecting the Dragon Word Wall in the Forsaken Crypt of the Forsaken Cave, he initially lies in a tomb before the wall, undisturbed. While sneaking, the tomb lid pops off without him actually getting out of the tomb. Curalmil is encountered on the quest for the White Phial.

Strategy
It is advisable to let the tomb lid pop off while in sneak mode as the other Draugrs will come out of their tombs. This makes the fight easier, as the player can defeat the other Draugr first, before handling Curalmil. Once out of the tomb, Curalmil can be soloed by using his tomb as a guard, running around it while he gets stuck on the edges, shooting him with a bow and arrow, and repeating the process.

You can also leave the tomb after the lid pops off backtracking to the previous room. Curalmil will follow you and while he is in the passageway with the swinging traps you can close the iron doors forcing him to suffer damage from the traps as he makes his way towards you.

If you aren't up to defeating Curalmil in combat, it's actually possible to use stealth to move around the chamber to waken the Draugr, lure them to the outer hallway and kill them individually, move down the central hallway between the stairs to retrieve the White Phial, and even go up the steps to read the Dragon Word, all without waking him. Also if you possess Assassin's Warrior skill and Dark Brotherhood's Shrouded Gloves you will end up with a damage multiplier of 30 when using dagger. In sneak mode you can go to the sleeping draugr and kill them in their sleep. The same tactic can be used with Curalmil, he can be killed in his sarcophagus with two backstabs using a proper dagger.

If you can't defeat Curalmil in combat, there is an easier way to kill him. If you have joined The Companions and completed the quest The Silver Hand, turn into a werewolf and use the roaring attack. It will make him run away from you and he will not attack for the time he is scared. Repeat until he's defeated. With this technique, Curalmil's magic spell won't work because you don't hold any weapons.

He appears as a dragon priest at high levels, in which case he uses spells instead of the normal Draugr attacks.

Also note that he uses the Dragon shout, FO KRAH DIIN.