The Ugly Sister Marries in Her Sister’s Place? I Strike Back with the Potential to Become a Great Emperor

[Multiple heroines + empresses + fairies + demonesses + high-octane action] Xiao Ran transmigrates to a fantasy world and obtains the Medical Replication System. Not only can he easily heal powerful cultivators' old injuries and hidden ailments, he can also take the opportunity to replicate their supernatural abilities, cultivation techniques, and physiques. On his wedding day, the childhood sweetheart who had agreed to marry him deliberately swaps the bride for an ugly girl. Xiao Ran effortlessly heals her and gives her a physique with the potential to become a Great Emperor. The entire wedding is stunned. His future mother-in-law's family regrets it so much their guts twist, and his childhood sweetheart is so devastated she shuts herself away. From then on, Xiao Ran relies on his unfathomable medical skills to make his way through the fantasy world. He helps the empress of a dynasty restore her shattered Supreme Phoenix Bone and obtains an undying yin-yang flame with the power of rebirth. He helps Queen Medusa complete her bloodline and gains the Four Symbols Immortal-Slaying Formation. He helps the Fallen Angel Queen restore her broken wings and obtains the method to summon a shadow army. He helps Willow God achieve rebirth and gains a Chaos Dao Seed spiritual root! Many years later, Xiao Ran stands at the pinnacle of the Myriad Worlds, surrounded by a group of stunning empresses. He can't help but sigh. Being invincible is truly lonely. At first, he only wanted to help these women favored by fate heal their hidden injuries and old ailments. He never expected to make them all utterly devoted to him. Now they constantly beg him to treat their yin-yang imbalances and infertility. This really puts him in a difficult position.