Chi

Chi is a feature of the Zombies map Shaolin Shuffle of Call of Duty: Infinite Warfare. It is a set of four different schools of Kung-Fu, being that of the Dragon, Snake, Crane, and Tiger. Each one can be accessed by talking to Pam Grier in the Black Cat Dojo after the first wave of Skating Divas has been defeated. Each school can be upgraded up to three times, with each tier unlocking new abilities with the first tier unlocking the use of Shurikens within that school of Chi, the second tier unlocking the Chi ability of the school and the third allowing the summoning of a spirit version of the animal that the school is based on.
Each school of Chi affects the abilities given, Shuriken gain additional affects if held out for a duration.
Chi can also unlock unique paths that are locked off by doors bearing icons of the four schools or by Torii gates, attacking them will destroy them and unlock a new path.