Set in the Warring States period in ancient China, Phoenix Dynasty Online is a free to play fantasy MMO. There are a deep quest system, player mounts, plenty of high-level content, as well as several PvP modes.
Lots of monsters are available to slay, special unlockable items, item crafting, and a skill tree that includes a job system. One notable feature is the Tower of No Regrets, filled with creatures as well as special loot.