Random Multi Charm

[jolelele]

Ive been working on this very complicated map (not hard to make but much to make) and I have something called faith (how much the people belive in the king) I need to make a spell that charms random units based on the faith lets say that you have 50 faith and a spell that has a 70% chance of converting units in an area then the chance of converting becomes 20% (I dont want a 20% chance of ALL units being charmed I want all to be randomised) Is this possible? If it is pleace tell me how to do it (tell me every step Im not so good at spell making)

 

[baassee]

use if then else multi

to get chance value use

random number between xxx and yyy equal to or less then "chance"

chance will be your chance value

then you have the actions