Merlin Radiation
Merlin Radition, often called "magic," is a type of localized radiation that can be manipulated by certain people and appears to have strange effects on the world around it. Because of the nature of the radtion it is not capable of exact quantification and as such is measured in a probability. For example a measurement of 1d20 gigamerlins indicates that at any time there may be between 1 and 20 gigamerlins of merlin radiation present. A measurement of 2d20 gigamerlins indicates that there may be between 2 and 40 gigamerlins and so on.