Supernatural Revival: I Can Command Ghosts at No Cost

When Wang Ping steps into an abandoned apartment building for an astronomical delivery fee, he thinks it's just a life-risking side job. Only when a vengeful ghost comes for him and the elevator plummets to level -18 does he realize that the delivery order has opened the gates of hell. At the brink of death, the [Devour Ghosts to Grow Stronger] System suddenly awakens. Others must pay with their lifespans and sanity to command ghosts, but he can evolve without limit by devouring evil spirits.