I Ate the Elixir of the Demon Cult Leader and Escaped

*This work is available for both 15+ and 19+ audiences. Please note that some scenes and plot developments may differ depending on the age rating. "Am I your personal yin energy battery? You come to suck me dry whenever you need it?" I transmigrated into a martial arts novel I usually enjoyed. As the dying side character, 'Seol Ah-heon.' And I supposedly stole a divine elixir? From the Demonic Cult's young leader, 'Baek Geon-ha'? Why did I have to transmigrate into the moment I was stealing the elixir and running away! Might as well go all in. If I'm going to die anyway, I'd rather eat the elixir, so I swallowed it. But Seol Ah-heon's escape fails, and Baek Geon-ha tries to cut open Se...