The System's Descent: Etherious

Getting hit by a truck didn't Isekai Arthur Ward, but he did wake up in a world forever changed. When Earth evolves, passing a threshold few even knew existed, humanity is whisked away by the Grand System to engage in an educational Tutorial to bring them up to speed, the introduction of the new energy source that has been made available: Ether.

Two weeks have passed since the System's descent. Humanity is adapting, some thrive, whilst others struggle to survive. Arthur Ward has made quite a name for himself as one of the premier healers in all of America. Things are going well. He's growing into his strength and making strides towards unlocking a powerful class. Missing the Tutorial is quickly proving to be the best thing that's ever happened to him. Unfortunately, peace cannot last. Nefarious groups have started coming out of the woodwork, people with no qualms about what or who they must sacrifice to fulfill their goals.

Arthur Ward is no stranger to loss. Life has taken from him time and time again. With the descent of the Grand System, he almost believed things might have changed. Unfortunately, the world is not so kind a place. Arthur finally knows why he's been struggling so much with his magic, and the answer reveals a fate more dire than anything he could have ever imagined. Ether is the least of his worries when death itself looms on the horizon, the destruction of his very being.

Arthur has finally fixed his soul. Now, he must face the world. With the Locus of Power behind him, Arthur has bested stronger enemies than most will ever face. He thought he was returning to peace, but the System law had been broken. Alien races walk the land before their time, and they have his name on their lips. His power means he is feared. His blood makes him a target. Before, he would have run. Now the Perfect Homunculus must hunt.