I, a Battlefield Soldier, the Evil Spirit in the Smoke!

Completed. Extra chapters updated at random.

Ten years ago, Chen Yan was an ordinary college student. After an accident, the System forcibly took him to a world called Battlefield. After years of life-and-death trials, once he'd unlocked everything, the System destroyed itself. Having survived the war, he transmigrated to other worlds and began looking for a way home.

During the Holy Grail War, a strange man was summoned. Hearing that the Holy Grail could grant any wish, he picked up the strange baton on the ground, drew the revolver from his holster, and threw who-knows-how-many more smoke grenades, setting off on his quest to claim the Holy Grail.

According to a kindhearted citizen named Mr. Jin, who preferred not to reveal his name, he was just passing through a familiar intersection that night when a hard, cold club came flying at him.

According to a certain Mr. Bone, who preferred not to reveal his gender, that mysterious man had completely wrecked his defensive shield with a syringe.

According to Miss Green, who wouldn't say whether she was slacking off, the Commander often charged in even more fiercely than the girls at headquarters!

Also known as The Ace Pilot and the Ace Tank Driver and Whose Head Is Harder, Yours or My Strange Baton?