Quote by Terry Pratchett
A Thaum is the basic unit of magical strength. It has been universally established as the amount of magic needed to create one small white pigeon or three normal-sized billiard balls.
Summary
This quote presents the concept of a "Thaum" as the fundamental unit of magical strength. It defines a Thaum as the precise measure of magic required to conjure either a small white pigeon or three regular-sized billiard balls. This explanation showcases the idea that magical abilities and feats can be quantified and measured using this unit, emphasizing the standardized nature of magical energy.