Heretic Spellblade

Nathan had everything before the demons invaded: power, wealth, magical talent, loyal soldiers. Now a demonic general offers him an impossible choice—die or return to the past and change everything. Armed with future knowledge, Nathan must rebuild his strength through Bastions and champions who channel location-based power to fight demons. But as he succeeds, his enemies grow stronger exponentially. Eight books of time-loop mechanics, dark fantasy, demonic warfare, and an intricate exploration of how changing the past creates new threats.