The most prominent and important new currency being introduced in Warlords of Draenor is  Apexis Crystal. This currency is used to purchase everything from pets and mounts to pre-raid gear, bonus rolls, and transmog items.

 
Sources of Apexis Crystals
 Apexis Crystal can be obtained through a few different methods. Before we begin, though, it is worth noting that you can only carry a maximum of 20,000  Apexis Crystal at any given time. Before you follow any of the below methods of collecting additional  Apexis Crystal, be sure that you are not in danger of capping and losing out on some!