I, the Black Dragon Grand Duke, Just Want to Make Money for Infrastructure Construction

He had just traveled through Jackie Chan, and before he had time to be happy, he was kicked off the cliff by Dragon Mother because he was too thin, and was exiled to a deserted island to die! In despair, the Dragon Clan inheritance was activated, but the content inside made me dumbfounded! [Unlocking: Cement firing and concrete pouring technology... Warning! The temperature of your dragon's breath is too high, please switch to low temperature mode! Congratulations! Successfully developed multifunctional feed for pigs, unlocking: Guide to crossbreeding and castration surgery...] Thus, a black dragon with a unique painting style was born! The other evil dragons are catching the princess, while I am catching the goblins to form an engineering team! Other evil dragons are collecting treasures, while I am mining, making steel and building a blast furnace! Other evil dragons relied on their power to frighten everything. I roared with a loudspeaker: "The foundation is dug crooked! That kobold doesn't want his wages anymore!" A few years later, when dragons, humans, and elves formed a coalition and attacked my "Evil Dragon Island" with great force, everyone was stunned. Under the steel sky that blocks out the sun, countless factories are spewing thick industrial smoke, and a cyberpunk-like giant city stands between heaven and earth! And I was wearing a safety helmet, holding a cigar in my mouth, overlooking my empire, with a kind capitalist smile on my face: "Welcome to my city, everyone... Do you want to be optimized by me, or do you want to work for me?"