Mystical Revolution

On one fateful day 50 towers rose across the world forcing people over the age of 18 to awaken something called a Innate power and enter the towers to do a mandatory completion of 10 floors before allowing any escape causing 65% of the population to perish, but along with it brought upon new advancements and creatures alongside with the ability to get even more powers, those seeking further power and riches became people known as tower climbers and started banding together as much as they could to climb these towers.

Now Izumi Erebus on his 18th birthday must complete his 10 floors but without any Innate power of his own. Will he be able to gain powers of his own and survive in this tower?