Enter Alex, pretty normal guy, budding interest in girls, good grades, sadly orphaned.
He knew what he would do after graduation.
He had hopes and dreams, mostly unfulfilled, like every other teenager there is.
He knew what life would give him.
Until a decisive morning changed everything.
Congratulations Humanity, your greed and destruction of Nature has corrupted your worldcore. While your parents fight at the front, you, the children, are given a grace period, until you turn 20 years old. Then you have to join them and clean the corruption. It can't be cleaned through simple means, but fear not, we, the most esteemed and paramount council, have given you tools to grow in power.
Your world may crumble to ash and dust, but you will rise like a Phoenix or decay in timeless strife. Rise, grow and conquer your foe.
[participant in the Royal Road Writathon challenge]