There are mysterious keys scattered all over the world and hidden inside magic stones. Obtaining them will be simple, all you have to do is defeat monsters or complete daily quests given near the dungeons. Extracting the magic keys may give you equipment upgrade items, experience potions, resurrection scrolls and much more.
If you have an active premium account, the chance of finding magic stones is doubled.
Defeating a member of the opposite faction allows you to take one half of the lesser magic stones they were carrying.