Old Paledrake Soul
The Old Paledrake Soul is dropped by Duke's Dear Freja on a level 2 Bonfire Intensity in Brightstone Cove, this can be achieved through advancing into NG+ or by using a Bonfire Ascetic on the final bonfire in Brightstone Cove (the one next to Ornifex)
The Old Paledrake Soul can be traded into the Moonlight Greatsword an Int based Greatsword with a special R2 attack that requires 18 in Str, Dex and Int to wield.