Terminology

If one  overclocked a Gem , it could produce power that was one rank above its current rank for a short period of time. As a backlash, the Gem lost its power for a certain amount of time. If one pushed it too far, the Gem would break.

 Activation time  - It takes a certain time for a gems to summon its ability. This activation time depends on the skills of the connector and the gems level. The first activation takes longer than the following activation.

 Magic Resistance  - High ranked monsters are capable of resisting magic gems to a certain extent. (e.g. Centaur can ignore gems up to Orange rank. However, orange rank gems can not inflict critical wounds.)

 Mana Steam 

 Generation 

 Moon vehicle 

 Labyrinth 

 Magical Void  - It is a space that appears within the Mana Stream. They are like the eye of a storm. These spaces are completely devoid of magical energy. It is theorized that this phenomenon is caused by an interaction between the current of magical energy and the layout of the labyrinth. Of course, it is only a theory. Magical Voids are places where monsters do not show up. Monsters would never voluntarily enter this place.