Ancient being three billion years old, the Geometer is the last member of a long extinct race. He was the first entity to create a mathematical equation to describe the entire universe, from atoms to galaxies. Believing this equation was so pure and perfect, he gained a high status among his people.
But another scientist observed another phisical event which was not possible to include in the equation, so the Geometer left this universe to seek another one more perfect, which wouldn't betray his mathematical perfection.
For the next millions of years, the Geometer spent his life to modify the met universes to adjust the imperfections and make them the mathematical perfection. This scope he gained by using a metamorphical energy he discovered somewhere