Images:

gw2-whispers-secret-greatswordgw2-whispers-secret-greatsword-2gw2-whispers-secret-greatsword-3

Set:

Slot Item Name Trading Post Preview Code
Greatsword http://db.dulfy.net/item/63527 [&AgGdeQAA]

Where to Obtain:

Whisper order merchant in Bloodtide Coast (5 gold 50 silver, must be in Whisper Order).