Billions of Monsters Are Coming, and the Territorial Forts Will Evolve Infinitely

Everyone travels across the world, descends into the gray fog world, and becomes a tower defense lord. You start with a lord's stone house, a wooden fence, and an inferior arrow tower that is in disrepair and has a slow attack speed. Du Wei's awakening supreme only level talent: Immortal Monument. Each time the territory levels up, a golden characteristic is unlocked. Start infinite evolution. [Old Arrow Tower] → Evolve → [Wooden Arrow Tower] (Attack power increased by 100%, range doubled!) [Wooden Arrow Tower] → Evolve → [Iron Arrow Repeating Crossbow Tower] (attack speed increased by ten times, with built-in armor-piercing bursts!) [Iron Arrow Crossbow Tower] → Evolve → [Multi-barreled Magic Cannon] (covered with firepower, not even a blade of grass will grow!) It is also blessed with golden characteristics, directly breaking the upper limit of the power system: Infinite energy! Ignore the cooldown! Never overload! Others were carefully collecting spiritual crystals to charge the arrow tower, but Du Wei's territory had become a restricted area for fire! Looking at the piles of monster corpses outside the territory, and the warehouses full of top-quality supplies. Duwe stands on top of the fort, overlooking the wilderness. "The heroic troops have gathered together, and the forts are full of firepower. It's time to accept a higher challenge."