Apexis Crystal

Apexis Crystals are taking the place of Valor Points in Warlords of Draenor for the purposes of non-raid armor acquisition. Rare-quality items are purchased with just Apexis Crystals, and upgrades can be acquired by trading in an item and/or Apexis Crystals to get a higher-quality version. The initial tier of Apexis Crystal items is rare quality at item level 630, the first upgrade is epic quality at item level 645, and the second upgrade is epic quality at item level 655. Baleful items begin at 650, and can be expowered to 695.

Lore
Apexis crystals were created by the ancient Anhari and Skalaxi orders of the Apexis to contain knowledge in lieu of scrolls or tomes, and just touching one is enough to gain the knowledge from within them. It is even possible to see the memories of the one who constructed the crystal. In the slowly expanding Gorian Empire, Apexis crystals became highly prized and eagerly sought out by ogre sorcerers.

One configuration of stars causes an unusual vibration in the crystals strewn across Draenor, relics of the ancient Apexis. Some swear that the crystals will multiply when left unattended beneath the night sky, but none have seen the phenomenon firsthand. A skilled diviner can use Apexis crystals to reveal oil deposits beneath the earth.

As a quest objective
As part of the quest chain to acquire the legendary ring, Archmage Khadgar wants exactly 4,986 Apexis Crystals to empower the item level 640 ring into an item level 680 version in Draenor's Secret Power.

Once a week, players may trade in increasing amounts of Apexis Crystals to acquire a Seal of Inevitable Fate, which awards one Bonus roll in Warlords 6.2 raid content, via the following weekly quests:
 * 1) Sealing Fate: Apexis Crystals (1,000)
 * 2) Sealing Fate: Heap of Apexis Crystals (2,000)
 * 3) Sealing Fate: Mountain of Apexis Crystals (4,000)

Turn in to Fate-Twister Seress at in Stormshield or Fate-Twister Tiklal at  in Warspear.

Armor
Trade in crystals to vendors at the faction capitals in Ashran: Stormshield and Warspear for the Alliance and Horde, respectively.

Reputation rewards
Most Draenor reputation factions sell a few items in exchange for Apexis Crystals:

See the Warlords of Draenor reputation rewards article for a full list.