As the DM, the tools of your trade are dice — platonic solid-
shaped or just about any other sort. The random numbers you
generate by rblling dice determine the results based on the
probabilities determined herein or those you have set forth on
your own. In case you are not familiar with probability curves,
there are two types which are determined by your dice: linear
(straight line),'which has equal probability of any given
integer in the number group, and bell (ascending and descending
line), which has greater probability towards the center of the
group of numbers than at either end. The two curves are
illustrated thus: [Image of linear curve for 10-sided dice, with
each number having a 10% chance of coming up.] Linear
probability develops a straight line of ascending probability
when used as a cumulative probability as shown above. Bell
distribution, when used to delineate the probability of certain
numbers appearing, develops o curved line like this: [Image of a
bell curve for a 3d6 roll, with 3 and 18 bei