"Pupil of Shao Kahn" is an artifact costume in the StrikeForce Kitty series, based on Shang Tsung from the Mortal Kombat video games.
Shang Tsung is the right-hand man of Shao Kahn, according to the games.
StrikeForce Kitty 2
"artifact 18" can be equipped to a kitten that wears either one of the following costumes: "Come here!", "Tundra", "Lizard", "Whiff", "Indigenous", or "Lightning-guy". "Pupil of Shao Kahn" does melee damage, and the passive ability is the same with the costume the kitten was wearing that was combined with the artifact.
"Pupil of Shao Kahn" adds 17 strength, 17 health, and 19 speed to that kitten. The total for each costume can be found on the character statistics under the rows containing the name "Pupil of Shao Kahn".
Note: There is no pants or shoes in the bottom-half of the costume, the same issue with "Mr. White", it may be a bug.
StrikeForce Kitty: Last Stand
"Pupil of Shao Kahn" is a costume that can be obtained from defeated raccoons in StrikeForce Kitty: Last Stand, look on pages in the "Melee" category. Unlike in StrikeForce Kitty 2, the pants and shoes do appear as intended.
StrikeForce Kitty League
The Shang Tsung costume in StrikeForce Kitty League can be obtained by defeating aFax a few times in the Flounder Division until the costume is acquired or by buying it by chance at the store for 100 fishes.
Wearing the costume gives the kitten the ability to create an aura, if successful, opponents will have a temporary 50% damage reduction for 8 seconds.