5.1 Orange Wu task or will reward the Eye of the Black Prince weapons punch

Legend of the Black Prince class quest line may provide incentives in 5.1: Eye of the Black Prince.
Today 5.1 PTR updated to Build 16281 MMO to find a new patch items: (1)

Eye of the Black Prince
Binds when picked up
Unique
Item Level 90
Use a Prismatic slot increase: for a Ransha the weapons.
"This slot will move, it seems like has its own ideas."
Provided by the Black Prince, the legendary level task reward an orange-quality gems in 5.0, 500 point main bonuses, only for Ransha weapons. 5.1 new raid quest line will continue, but it should not provide particularly strong incentive. If nothing else, this should be the the legend level task line in the 5.1 rewards.
Prismatic slots can be inlaid gemstones of any color, for non-jewelry professional players, the current version of the blue-quality gems can provide 160 points of the main attributes / 320 points deputy attributes / 60 points of the main attributes 160 points vice attributes.