Exquisite Bone Handle

From the Composite Bow Upgrade quest introduced in the Come What Follows event.

Dialogue
You give Yuan Hanzu Fossilized Bone. Yuan Hanzu tells you, "My yes, this bone will make an astoundingly good handle." Master Hanzu deftly carves the Fossilized Bone into an Exquisite Handle. Yuan Hanzu tells you, "Here you are. This can be used on the finest crafted Composite Bow and Composite Crossbow to increase their effectiveness." Yuan Hanzu gives you Exquisite Bone Handle. Yuan Hanzu tells you, "I wouldn't use that to upgrade your bow or crossbow unless you are sure you can handle a more powerful weapon. It may prove to be more than you can wield. If you decide you would rather have a different reward I can pass along a little experience I've learned in hunting."

You give Yuan Hanzu Exquisite Bone Handle. Yuan Hanzu tells you, "Alright, I'll just take that then. Here are a few pointers in tracking your target." You've earned 7,441,334 experience.