Tempestas

Tempestas (Tem-PES-taus) is the sixth planet in the Elemental Planets line. It has many storms as its name comes from Latin. The lightning there is 4,000,000 folds stronger than that on real-life Earth. Tempestas is the biggest of all the Elemental Planets.

It's moon, Dia is the very first thing that came into existence. Quite a feat for something so small.