See my write-up for
Illuminated. As far as
RuneQuest/
Glorantha game mechanics are concerned, there is supposed to be a
Nysalor Riddle for each
skill. Each time a character is exposed to a new
Riddle, they may attempt to solve the riddle using the better of their Illumination skill or the skill associated with the riddle. If they succeed, their Illumination skill increases by 1%, and
dice are rolled to see if the character has indeed become Illuminated. (Some
campaigns allow an annual check at
Sacred Time in addition to, or instead of, on-the-spot Illumination.)
There is some
contention among
gamers whether the
riddling should be
role-played, or just reduced to die rolls. The
role-playing approach requires that there be actual riddles.
Since many of the skills in Runequest have no real-world cognates (all the sorcery manipulation skills, e.g.), it's difficult to
drum up appropriate
koans for such skills.