The gray Ku school is devoted to the mastery of existential perception. Depending on the circumstances it can be either pacifistic or aggressive. Students of gray Ku attempt to understand the interplay between both black and white schools. The martial aspect involves using this knowledge to exploit the strengths and weaknesses of the two opposing schools to gain a strategic advantage over an opponent or opponents. Depending on the situation this may involve playing black and white against each other, and using sect secrets against their own school. Being the most ambiguous of the three schools it is not possible to gauge the difficulty or power of mastery. However it may be said that gray Ku is the most influential of the three schools, as it somewhat capriciously bridges and divides the other two.