You can collect a new World of Warcraft Sapphire Crab water pet through The War Within’s Magical Treasure buried in the sands of the Isle of Dorn.
Magical chests are hidden through the four zones of Khaz Algar in WoW: The War Within. The first zone you start in for the new expansion is called the Isle of Dorn, which is home to a Magical Treasure off the shores of Dornogal. Here’s how to find and open the chest to gain a Sapphire Crab pet and 150 reputation points with the Council of Dornogal.