Interesting! Thanks for your comment. I would like to add the definition of greenseer here, for those (as me) that do not know nothing about the series and books. ;)
Greenseer is the title given to people who possess the magical ability to perceive future, past or distant events in dreams known as Green Dreams. According to legend, greenseers were much respected by the Children of the Forest.
In the books
In the A Song of Ice and Fire books, greenseers were the wise men of the Children of the Forest who had magical abilities that included power over nature and prophetic visions. While one in a thousand men is born a skinchanger, one skinchanger in a thousand is born a greenseer. It is also mentioned that humans can be born greenseers just as they are born wargs.
From Games of Thrones Wiki: http://gameofthrones.wikia.com/wiki/Greenseer