The Rule of Equivalent Exchange

The Rule of Equivalent Exchange is one of the founding concepts of the Dreamscape. It states that in order for something to be gained, one must give up something of equal value. This Rule can be called upon by anyone in the Dreamscape at any time and its power has no limits as long as you can pay its price. Sometimes the Rule isn't something you control. For example, if a less adept apprentice happens to become the next in line for the job they're training for, it could be because of other people being injured while working even if the apprentice didn't call upon the Rule. If you call upon the Rule and pay its price you get the result. For example, if you wish to become the next king of an empire, the price may be assassinating the current king. Your reward will not be given until you pay the price.