Weirwood is an ancient tree from the literary work "A Song of Ice and Fire", which Eddard Stark called the "Heart Tree". In Winterfell, the bark of the weirwood is as white as bone, and the leaves are deep red, like a thousand bloodstained palms. The trunk is carved with a human face, a deep sunken eye hollow full of dried red sap, grotesque in description and full of caution.