Killverse.

In a near-future Tokyo, a mysterious system known only as the “Killverse” activates without warning, trapping thousands of civilians inside an invisible, inescapable barrier surrounding the city. The rules are simple—and merciless: kill, or remain powerless. Every participant is branded with a digital counter visible only to others. Those with zero kills are ordinary humans, fragile and defenseless. The moment a person takes a life, they awaken a unique ability—ranging from elemental control to reality distortion. With each additional kill, their power evolves, growing more destructive, more refined… and more unstable. TAS by Yi1i1i