Let's say, these gems are inspired on the Chaos Emeralds. These gems were crafted by the gods as a result of Prism Core's instability, each gem represents the power of each god (from red to purple) : Power, Fire, Light, Time, Ice, Darkness, Life

Legend is said that if someone gathers all seven, it is said that the multiverse will bind to the wielder's will, open gates to other universes and grant the ultimate power, make them unbeatable