National Tower Defense: I Can Refine Monsters Infinitely

When he woke up, Lin Luo traveled to a dark world invaded by trillions of dark creatures! Werewolves, vampires, ghouls, trolls, abominations, evil dragons, abyss dragons and other trillions of dark creatures will all attack human tower defense walls crazily. In order to continue the survival of mankind, everyone will be transported to the dark world after the age of 18 and build their own tower defense camps to resist the endless tide of monsters. When Lin Luo was transported to the dark world, he suddenly discovered that he had a system that could infinitely refine demons! Skeleton Soldier + Skeleton Soldier = Skeleton Sword and Shield Hand Black Dragon + Abyss Lord = Abyss Demonic Dragon Lord Skeleton Mage + Divinity = Skeleton Mage God Dark Elf + Ghost Faced Spider Lord = Dark Elf Lord Goddess Scepter + Sheep Transformation = Transformation Artifact A year later, a dark tide came. Countless dark monsters face legions that are hundreds of times stronger in quantity and quality than they do! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.