[Quest] - The Hanging Tree + The Hunter + The Lash of the Havens
So those three quests are still "hanging" on your KK achievement window? Not any more! Just follow the first quest from this chain which will lead you to the others:
The Hunter
x 1730, y 430
quest giver: Note (Ghost Hill)
...will lead you to...
The Hanging Tree
x 1550, y 305 (Graveyard)
quest giver: Grave
...will lead you to...
The Lash of the Heavens
x 1637, y 609 (Field of Stones)
quest giver: Zhaoji (NPC)
quest item: Iron Key (x 1904, x 588)
Tadaaaa! Gratz to you and your KK achievements :)