Geo21b

Information
Geo21b is an exo-planet located in the milky-way galaxy, This planet has two moons, one moon is always facing the direction of the planet, and the other gets closeby the planet every 5 months, the moon further from it maintains the Crystalic core on the planet.

This planet looks nothing like earth but has same stats, it has an invisible ozone layer exposing the planet to black sky and bright star, the planet is completely rocky on the surface with no grass or trees, it has oxygen.

However, the planet's Core is a complete crystal and is 89% of the planet's mass, it is not deep.

Stellarium
When the moon that maintains the Crystal core comes nearby the planet, the core becomes bigger and becomes close to the surface, during that period of time, the reinforced human that is standing on the surface will be on their peak of power, being able to generate crystal through the vibrations not being connected to their body, also generating ALOT more Crystal than on earth, This event is called "Stellarium"