Sahrotaar is a unique serpentine dragon found inside the Black Book: Waking Dreams during the quest At the Summit of Apocrypha.
His name might mean either "Mighty Servant" or "Phantom Word Servant" in the dragon language.
Sahrotaar will appear after you learn the Dragon Aspect shout, and it is then necessary to use the Bend Will shout on him to tame him and progress through the quest. Upon doing so, he will say, "Hail, thuri. Your thu'um has the mastery. Climb aboard and I will carry you to Miraak." At this point, the dragon riding tutorial is provided while riding him. He will warn you while taking you to Miraak, "Beware. Miraak is strong. He knew you would come here."
When you reach Miraak at the summit, he will chide Sahrotaar, saying, "Sahrotaar, are you so easily swayed?" At that point, a battle against Miraak ensues, and you can choose whether to fight him on the back of Sahrotaar or on foot. When Miraak regenerates for the third time, Sahrotaar will meet his demise, as Miraak absorbs his soul.
Sahrotaar knows the following shouts: Frost Breath, Ice Storm, and Unrelenting Force.
 Related Quests
- Sahrotaar also appears briefly during the quest The Temple of Miraak, waiting for Miraak to mount him while talking to you.
- Sahrotaar will be the third dragon that has its soul absorbed by Miraak during gameplay, providing Sahrotaar has not been killed beforehand.