Like that ashen, fantastic figure gliding toward him through the amorphous trees.
When Wilson is walking up to kill Gatsby he is described as an “Ashen Figure”
To Gatsby, and other members of the Upper Class, the Valley of the Ashes is a place filled with people that aren’t important. Gatsby carries the disguise of an upper class elite by looking down on Wilson in the final moments of his life. Wilson is also described as “fantastic”. Fantastic, in the context, doesn’t necessarily mean wonderful, but it means shocking or confounding. Wilson’s appearance and his actions are shocking to Gatsby.
To help improve the meaning of these lyrics, visit “The Great Gatsby (Chapter VIII)” by F. Scott Fitzgerald and leave a comment on the lyrics box