I Transmigrated into a Wasteland Apocalypse and Became the Only Super Nanny

[Superpowers + Cthulhu Mythos + Power Progression + Strong Female Lead + Serious Tone] Jiang Cheng transmigrates into a post-apocalyptic wasteland and discovers that once people with supernatural abilities run out of energy, they have to wait at least seven days for their powers to recharge fully. But Jiang Cheng becomes the only super healer in the entire wasteland who can instantly restore anyone's abilities. She plans to use her incredible instant-recharge skill to become a happy rich woman in the wasteland, but a test reveals living contamination inside her body, forcing her to begin an 80-day countdown to death. To search for clues on how to remove the contamination, she ventures deep into the contaminated zones and recruits a group of E-rank ability users abandoned by the official organization. With her unlimited energy-recharge skill, she somehow “heals” them into fighters with power beyond S-rank. Those E-rank ability users who could barely conjure a tiny flame even after exhausting their powers can now fire off volleys of fireballs like a Gatling gun... And so, a mysterious organization called the “Wasteland Misfits” emerges from nowhere, giving the official organization headaches and leaving villains trembling with fear. Legend has it that their leader is a ruthless, reclusive demon, and that her subordinates are all monsters. Few people know that within the official organization's squad, she's just a sweet, helpless support who sometimes needs a teammate to open a bottle for her... Until one day, an S-rank disaster strikes. The official organization's main squad is wiped out, leaving only Jiang Cheng trapped in the contaminated zone, fighting to the death against the final boss. While everyone is mourning Jiang Cheng, an anonymous post on the ability-users' forum suddenly shoots to the top of the front page: “Help! Urgent! I accidentally healed an S-rank boss to death. How do I explain this without revealing my secret identity?”