Crystal

Crystals are seen in most Crash games as an energy source, a lot like gems. They are used in the series from Crash Bandicoot 2: Cortex Strikes Back all the way to Crash Nitro Kart 2. In state of fact their are 25 slave crystals one master crystal and the super big power crystal (the mother of all crystals), these Crystals were mostly used for evil to control all of Dr. Cortex's machines and gadets