5.1 legendary and upgrading items

These mobs, Mjordin Combatants are all clustered in a small area, sparring with each other. If you're at least level 80, you should have some panda greenies or blues on you for some easy kills. These also offer a decent amount of experience if you're under level 85. (Over a million with rested from 30 minutes of farming)

5.1 PTR: Legendary and Faction Quests

Since we last covered new quests in 5.1, there's been some big updates we wanted to share about legendary and faction quests. We datamined some possible rewards for the legendary chain in 5.1, including new gems and sockets. We also pieced together more of the epic 5.1 faction questlines and now know that they reward players with a mount!

Legendary Quests

• There are upgraded versions of legendary gems:  Refined Crystallized Dread,  Refined Crystallized Horror,  Refined Crystallized Terror.
•  Eye of the Black Prince allows you to add another gem socket to your Sha-Touched weapon, similar to  Living Steel Belt Buckle. These are for regular gems, not additional legendary gems.
• Since we last covered the datamined quests, Blizzard has trimmed down the PvP requirements. Instead of winning 10 Battlegrounds, you only have to win one in Temple of Kotmogu and Silvershard Mines.
• Two achievements have been added:  A Test of Valor/ A Test of Valor requires you to obtain 6000 Valor Points, and  Chapter II: Wrathion's War/ Chapter II: Wrathion's War is for completing all of Wrathion's 5.1 quests.

Upgrading items

The majority of gear upgrades in 5.1 will come through a new currency-based upgrade system. Players can permanently increase the ilvl of their 458+ gear by visiting a new Ethereal and cashing in spare currency.

We've also developed some features at Wowhead to help you plan your upgrades!

• Each item's page has toggle options to display upgraded stats.
• An Upgrade column has been added to search result pages. This displays all the upgrade versions for an item in icon form, similar to dynamic quest rewards. Mousing over these icons will display the upgraded versions.
• A new search filter has been added: Can Be Upgraded, under General.
• Advanced tooltip code has been added so you can display a specific upgraded item's tooltip.

original scource is  wowhead.com