Let the Villain and Hero Keep Fighting, I'll Survive as a Nobody

Lin Qi transmigrated as a mere passerby. In his first life, he unsurprisingly died in the struggle between the Chosen Ones. But by a twist of fate, he was reborn one year before the great war began, and his Billionfold Comprehension System activated. The longer he stayed alive, the greater his comprehension became, until it reached a billionfold! Survive for ten days, gain tenfold comprehension, and master a technique in two days! Survive for a hundred days, gain a hundredfold comprehension, and master a secret art in an hour! Survive for a thousand days, gain a thousandfold comprehension, and master a divine ability in an instant! “You major villains can carry on fighting the Children of Destiny. I’m just Passerby A, and I can keep hiding in the background!” A villain favored by destiny said, “Strange. I’ve killed countless people in my life, and plenty of Children of Destiny have died at my hands. So why is this guy still alive?” A Child of Fortune said, “When I infiltrated the sect and killed the Demon Emperor, he was an outer disciple. Now, after dozens of battles, the sect is nearly destroyed, and he’s still an outer disciple?” An emperor said, “Lin Qi, damn you! I’ve used up the lifespans of two entire lives, yet you’re still alive, and you still claim you’re just Passerby A? You’re here to see me off?!”