Chapter 2: Gina Fey
The gate that the Five Rulers closed down was colored Green and it was seen as the highest possible Gate that could open in the world.
Gates were color graded based on how dangerous they were, with the weakest being the Red Gate, followed by the Orange Gate, Yellow Gate, and then finally, the Green Gate. People speculated that there were far stronger gates than the Green Gate, but no one had ever seen one before, so humanity as a whole accepted that green was the highest level a Gate could reach.
After the Five Rulers, there was a surge in the number of superhumans all over the world. Scientists believed that it was due to the sudden influx of mana from the Gate that the humans were developing such abilities, but no one could really explain it since it was so sudden.
The superhumans who gained Gifts would develop one ability or another. Some of them gained the ability to use fire-based attacks. Others gained the ability to control objects with their minds, or the ability to heal any wound instantaneously.
But after a lot of superhumans emerged, the abilities in existence were eventually boiled down to five major divisions.
Brawlers - Those with physical-based abilities or augmentations.
Emitters - Those with elemental attacks or mana emissions.
Supporters - Those with abilities that boost or reduce the strength of others.
Healers - Those with abilities that can aid in healing wounds.
Special - Those with abilities that cannot be classified into any of the other four categories.
All the abilities in the world could be put under one of these five categories, and the government began a system where they would register anyone who developed an ability and make sure that they were following strict rules so they didn't misuse their powers.