[Urban superpowers + no System + humorous and witty + a slow start + immortal cultivation + mystery]
In this city of superpowers, everyone gets one chance to awaken an ability upon reaching adulthood.
An ability is the perfect expression of a person's desires.
Some want to become the Flash and gain the power of super speed.
Some want to become Spider-Man and gain the power of spider mimicry.
Some want to become Batman, so their parents die horribly in a factory accident and leave them a huge payout, turning them into a rich orphan...
Lin Tao, a mighty tribulation-surviving cultivator who accidentally transmigrated here, awakens a Heavenly Book ability that lets him cultivate techniques thanks to his longing for immortal cultivation. By stepping on his own left foot with his right, he cultivates immortality while others awaken superpowers, and will eventually trample this world underfoot.
The enemies he must face will include a dark version of Batman, Professor X, the Flash, Superman...
Does this have anything to do with cultivating immortality?