X'caliboar

X'caliboar is a sword which adds more strength and stamina to its wielder.

Source
This item drops off of Death Speaker Blackthorn and Sah'rhee in the Razorfen Downs.

Trivia
The sword's name is a reference to Excalibur, which is King Arthur's sword. It also reflects that it drops off a quilboar with "boar" in the sword's name.