Doom Guy Isekai

A soldier forged in endless war against Hell’s legions finally falls, his body overrun and broken. Yet death is not his release—it is his redeployment. Awakening in a realm of ash and torment, he discovers his true purpose: to lead the damned as a commander in an eternal conflict. With every demon he slays, he carves a path toward a mysterious throne that holds the key to ending the cycle. But Hell’s hierarchy will not yield without a fight, and ancient powers hunger for his soul. The war never ended—it only grew more brutal.