Berserker

Awakened as a Berserker with powers fueled by rage, Jonathan finds himself caught between his death wish and his surviving son David's desperate attempts to reconnect. With ancient powers stirring and hidden factions maneuvering for control, Jonathan must decide if there's still something worth living for. - A gritty, realistic exploration of grief and redemption - Military veteran MC with a powerful Berserker class - Complex father-son relationships - Strong to Stronger MC - Character growth and a complete arc — Description from novelcodex.org