Magic and Psionics (Moon of Five Suns Supplement)
From D&D Wiki
Their are powerful forces in the world of the Moon of Five Suns, the arcane magics, divine magics, and psionic powers available to many characters. These forces, while potent and volatile, are limited. They are sometimes inaccessible, at other times unrestrained. This is affected by the state of the Suns that the Moon orbits. One sun affects arcane magics, one divine magics, and one psionic powers.
Discuss with your DM the state of these forces before employing them with your character as they may be limited in the time period in which your campaign is poised to take place.