Nailmaker: The Reaper, an Isekai LitRPG

Jaded veteran Jack, once shunned and abused on Earth, transforms into a formidable force each night as he seeks vengeance against the corrupt and those who threaten his world. When portals open, unleashing demons and an approaching army, Jack must confront monsters and rising threats to protect what’s his. Combining overpowered abilities with fast-paced action, this LitRPG and Isekai adventure follows his steady progression through dangerous challenges.