Re-Overlord: I Can Acquire Anything! - Chapter 87: Dark Knight

The emperor of the mercenary world! The sovereign of the Assassin Realm! The supreme one in the medical arts! When Xiao Tian returns to the city, he embarks on a monstrous overlord path!“I want you dead, you cannot live!”

This is a story about a badass,

Alex was an ordinary teenager—until the day he discovered his ability to drain energy from the dead. With powers rooted in death itself, Alex hides his necromancy behind a normal life, secretly entering deadly portals to fight monsters and earn money. But beneath the surface, a darker truth lingers—his parents's death and his powers are linkedAs he harnesses his necromantic abilities, draining the fallen to grow stronger, the weight of his power begins to take its toll—and the line between the living and the dead starts to blur.With enemies closing in and betrayal around every corner, Alex must master his growing abilities before they consume him—or worse, before the forces hunting him claim everything he has left.When death becomes your greatest weapon, how long can you survive before it turns against you?---

One day, a tower appeared in the skies of all the major cities…