Urano Metria is an uncategorized spell. This spell has been called the "Ultimate Magic of the Stars".
When the user recites the incantation, the 88 constellations of the sky come down as spheres and bestow their power upon the caster. This person then aims at their intended target and releases the energy gathered into a tremendous attack.
Survey the Heavens, Open the Heavens... All the stars, far and wide... Show me thy appearance... With such shine. Oh Tetrabiblos... I am the ruler of the stars... Aspect become complete... Open thy malevolent gate. Oh 88 Stars of the heaven... Shine! Urano Metria!
- Lucy Heartfilia: She gained the ability to cast this spell thanks to Hibiki, who transferred the spell into her mind through his Archive Magic. However, Hibiki only gave her a one-time casting, so she cannot use Urano Metria again unless she learns how to cast the spell properly through practice. After casting the spell, Lucy wasn't able to remember anything of what she had just done, implying that she entered into a trance of sorts in order to activate Urano Metria. Later, Lucy learned to cast the spell on her own by doubling her Magic Power with help from Gemini when they took on her form. However, according to Lucy, the amount of power is still lower than the first time she used it.
- The name of this spell refers to the very first great Star Atlas, named Uranometria, created in 1603 by the German Lawyer and Astronomer Johann Bayer. The text's name is Graeco-Latin and means "Measuring Heaven/Measuring the Sky", like the opening stanza of the spell. The spell makes references to the 88 classical constellations, which are, like the stars mapped in Uranometria, made up of stars which are visible with the naked eye.
- Urano Metria has the greek meaning of 'Urano' which means sky and 'Metria' which means measuring.