Apocalypse, ability trading, projected abilities, no misplaced compassion, survival, lighthearted, unhinged, no harem
Purple light descends, turning 95% of humanity into zombies.
The protagonist binds to an Ability Trading System and has abilities written by an author in his mind.
He can use them himself or sell them. As long as he survives, he earns attribute points and grows stronger.
Unfortunately, the projected abilities are wildly off the mark. Indestructibility is projected as an Iron Elbow, which supporting characters can only use as a boxing glove. Telekinesis can only control teacups, and invisibility only hides the upper half of the body.
Even his own Lightning God transformation becomes teeth that shoot electricity: bite someone, and they get shocked.
"Do you coexist with the people nearby?"
Protagonist: "No. I coexist with all of humanity. If I die, everyone dies with me."
"Just who are you?"
Protagonist: "The Apocalypse's ability broker, lord of abilities, the common father of all humanity, the Father of Destiny."
The two emperors bow their heads, the three kings kneel, and the Four Extremes aren't even worthy of carrying his shoes.
A cruel Apocalypse? Ferocious zombies? Desperate survivors? No, they're just customers everywhere you look.
He is the one true god of the Apocalypse: Wei He!!!
(Even a lunatic can be a god.)