Mercenary System: I can increase innate potential ! - Chapter 42: Rapid evolution

In the twenty-seventh year of Hong Guang, the allied forces of seven nations invaded the Great Blue Dynasty.Rifled muskets, mortars, and armored vehicles combined into a steel tide, were ultimately shattered by the Great Blue's armored cavalry.Muscle, magic, firearms, cannons... the new and the old powers continuously collided.In an era of great strife, Li Fei, with the help of a Ten Thousand Blood Bead, gradually became an existence akin to a BOSS:'Is this the extent of your damage? You haven't even taken off one-thousandth of my health.''You don't think this is enough to kill me, do you?''Don't rush, the second phase is up next!'......

(Warning Mature Content R-18)After a catastrophic plane crash, a group of college students find themselves marooned on a mysterious, uncharted island teeming with an ancient, aphrodisiacal energy. As they adapt to their new reality, the island's seductive influence heightens their libidos, awakening latent powers alongside primal urges of lust, envy, and avarice.Beneath the paradise-like facade, the island proves to be a manipulative prison, thriving on their deepest desires and fears. Survival hinges on more than just overcoming the island's perils; it demands they confront the beasts within, where every alliance is tested by temptation, and every passion could lead to their ultimate downfall.

Mortimer Zhu is an extremely unfortunate high school student who accidentally enrolls into an academy of a dubious nature, where it is the norm to jump in front of moving trains, get dismembered during orientation, and crushed by vindictive bouncing classrooms. Can he stay alive or will he die from the rigors of school? Why have evil spirits suddenly acquired a taste for his flesh?

- Description from Novelupdates

Our protagonist Caam is a man from Earth that was reincarnated into this world as a demon. In order to survive, he spared no effort in avoiding the sparks of battle and without noticing it, he became strong himself.