Sentai 6

Sentai 6 is the planet where the Energems was originally located and possibly sealed away as to prevent evil beings from using its power.

History
It is said that, long ago, after the Energems were created, Keeper and Zenowing had the ten regular Energems along with them, plus an eleventh one, made by the residual dark energy which created the others, also known as the Talon Energem. The master and apprentice had the item sealed on the planet and departed. Later on, Lord Arcanon became aware of its location and went to the world in person. Knowing the difficulty of finding even a single Energem while bent on having it, the dark lord destroyed the entire planet, and took it with him.

He would later reveal its whereabouts once he arrived on Earth.