Every era has its own survival rules, its historical process, and its inventions that should arise; thus, even though Wufu came to this world, she did not create too many things that did not fit into this world, to avoid disrupting its intended systems.
And while the vouchers issued by the soon-to-open shop are novel, this world is not devoid of similar promotional tactics; Wufu merely made a slight modification.
But she had no intention of making drastic changes, just like with the bomb in her hand.
One would know that if such a device were to be mass-produced and used in wars, the using side would be invincible, but it would inevitably lead to widespread slaughter.
Because the power of this thing is truly enormous.
