A man he was, an advisor clever and mean
And as a man of wisdom to most he was seen.
Guided by his master he yet guided astray
Til he would have brought all to ruin save for the grey.
Grima Wormtongue
Gríma Wormtongue was the chief advisor to King Théoden of Rohan. He was the son of Gálmód.
Tolkien Gateway: Gríma Wormtongue