How to get the yellow cultist skin in MP ?
You could try looking in the assets and im sure you will be able to find your answer there.
First, choose the cultist skin, then use the "char_color_blue", char_color_green or char_color_red to ajust the color to yellow.
or be easy, and in mp, do /model cultist/brown
now that you mention it a yellow cultist would look alot like MK Scorpion O_o
maybe add some "get over here!" taunts :P