Shang Tsung (尚宗 - pinyin: shàng zōng) is a fictional boss and player character from the Mortal Kombat series. A powerful evil warlock, he is a demonic shapeshifter who absorbs the living souls of those he defeats in order to maintain his youth and power and is able to change his appearance, including by morphing into other characters while retaining their abilities and movesets in-game. Shang Tsung is usually portrayed as the right-hand man of series archvillain Shao Kahn and the main rival and archenemy of Liu Kang.
Shang Tsung debuted in the original Mortal Kombat, serving as the in-game tournament's grandmaster and the game's final boss. He has since appeared in several games and other media spawned from the franchise, and was received positively by game critics.
Source: Wikipedia, "[en.wikipedia.org/wiki/Shang_Tsung Shang Tsung]", available under the CC-BY-SA License.