the core was rapidly burning out and eventually died down that leads to the creation of mana Ray a part of phase in reviving a planet core. Altering the natural state of earth this phenomenon is known as Megalithic event .
In that event atmospheric pressure had increased, making it hard to move. then the body structure of living things is crush to the ground making it hard to adopt in living. (imagine pain gravitional pull 5 % pwr...naruto)
Though the reviving of core is giving off blue Ray
throughout the globe but with this sudden change people did not adopt abruptly
humans and animals requires two times the effort to move back before the great event happened. The world was in chaos. The progress of humans is in halt.
With just 2 days 1/4 of the total population remained. Elders, infants and children the ones that suffered most
ranging from 16 to 35 years old are the ones that did survive.
Making the era now back as did in the past
Government society community did not function anymore
As time goes by people that are left behind begin adopting to its environment. Through mana absorption and minifestion overtime a person can be strong as a superhuman and through atom structure mananipulation people can make fire,Water,wind,heal, electricity (rapid regeneration of cells) aka magic
Also animals get affected by mana ray evolving in a more furious beast growing its body size double and begin to think more wisely
Technology is not usefull anymore though the machine is working and is good to use but there is no one who can maintin and make it function. like satellite Internet electric plant. Though an average people know it function but can't operate it.
{person can use electricity for Elec car transport and any other technology to use but it would deplete their mana reserve in its inconvenience so people use tamed evolved horse for transport and etc... }
The society collapse the ones left behind tried to make a system where people gather as guild.
Its just a give and take relationship if one wants to settled down then they need to pay taxes in return for protection of monsters and occupying the land and these taxes are given to adventurers as payment
To determine the rank of an adventurer it will depend upon their contribution of work like merit points and their mana pool. The higher the mana pool the more you can use magic and skill like super strength
I was 18 when it happened and...