C251 The Origin of the Poison Incense

"The soft, ethereal blue..." Changge murmured to herself. "So, this poison incense is indeed not to be underestimated! Thank you for coming today, Doctor." Changge offered a gentle smile.

"It's my duty, no need for formalities, my lady. Just make sure to store this incense carefully. If it were ever mistaken for regular incense, the consequences would be unimaginable