Zeo Crystal

The Zeo Crystal is a powerful object that produces enormous amounts of energy, constantly getting stronger as time went on. It was comprised of 5 sub-crystals, which also connected to Zeo Rangers to the Morphin Grid.

It was first explained by Ninjor and Zordon. The Zeo Crystal was brought to Earth's Moon by the beings from the M51 Galaxy a millennium ago, and hid it in the Caves of Deception below the Moon Palace. A forcefield created by the ancient race that put the crystal there would destroy any that aren't purely good. This is what caused Lord Zedd to get his macabre look, as he failed to seize the Zeo Crystal.