Millions of Blue Star humans descended into the void wilderness and started in a small wooden house, facing endless night attacks by monsters.
If you want to survive, you can only rely on defense lines and defense towers!
Su Yu awakened the only rare building [Maternal Gene Hotbed], which can extract the genes of all things and perform unlimited stitching mutations on defense towers!
[Ordinary Arrow Tower] + [Toxic Slime Gene] = [Strong Acid Rapid Fire Arrow Tower]! One arrow penetrated the black-scaled wild boar!
[Stone Man Blueprint] + [Slime Core] = [Clay Slime Miner]! The invincible mine slave who works 24/7!
[Wind Blade Tower] + [Fire Breathing Device] = [Wind Blade Flame Jet Tower]! 360 Degrees of fire with no blind spots!
[Thunder Winged Dragon] + [Space Gem] + [Magic Energy Monument] = [Sky Curtain Folding Instrument]! Space folds and rebounds meteors!
While his neighbors were still having headaches about air defense, Su Yu had already started a "defense tower rental business" and became the largest shady arms dealer in the region.
When the Demon King of the Abyss arrived and looked at the "Isengard Sky War Fortress" that covered the sky, towered into the clouds, and could move freely, the Demon King fell into deep thought...
"You call this a defense tower?!"
