His Grey Grace|
The Prince of Sorrows
|Book(s)||A Dance with Dragons|
The Shrouded Lord, also known as His Grey Grace and The Prince of Sorrows is a mysterious figure. Many say his is just a legend. 
The Shrouded Lord is said to rule the mists around the Sorrows since the time of Garin and to spread greyscale through "the grey kiss", although he does not bestow his kiss lightly according to Haldon. 
According to some rumors, he is thought to be Prince Garin himself, risen from his watery grave. Others believe that there have been numerous Shrouded Lords, and when one dies another one takes his place; the one currently holding the title is a corsair from the Basilisk Isles.
References in the books
A Song of Ice and Fire
As the Shy Maid and her crew pass through the Sorrows discussion turns to the Shrouded Lord and the various tales about him. Tyrion comes to associate the Shrouded Lord with the father he slew and has bad dreams of both.
He dreamt of his lord father and the Shrouded Lord. He dreamt that they were one and the same, and when his father wrapped stone arms around him and bent to give him his grey kiss, he woke with his mouth dry and rusty with the taste of blood and his heart hammering in his chest. 
- Tyrion awakening from his near drowning
- Tyrion, drunk in the Selhorys brothel