Finding the Bloodstone/Zaishen Quest

Summary

 * Help Gadd acquire the Bloodstone from Spakly Swamp on the Tarnished Coast.
 * *BONUS* Complete the mission in Hard Mode.

Dialogue
''     "The gloriously gifted Gadd will hear petitions for underlings to bask in his genius and assured success in Finding the Bloodstone. Interested petitioners can find the great Gadd at the Inscription Stone in Sparkfly Swamp on the Tarnished Coast." ''
 * Accept: I can do that!
 * Reject: No, I'm way too busy today.