Inside the underground base in Area 72 of the Sabaody Archipelago.
Su Xiao was fully focused on concocting the potion in his hands when a sudden knock interrupted him. The energy particles in the solution turned white, and fine ice crystals covered the test tube's walls. The concoction had failed.
Bubu Wang opened the door. As expected, the visitor was Koala, carrying a massive tray loaded with all kinds of delicacies.
"Hey, what's with this production volume? How long has it been since you last rested?"
After seeing the Stigmata Potions lined up on the metal table, Koala hurried into the room.
At that, Su Xiao picked up the timer on the table. It displayed 49 hours and 26 minutes. In other words, he had gone two days without sleep. This might be the only drawback of Alchemy: once he focused on research, it was very easy to become immersed in it.
"About two days."
"..."
Koala was speechless for a moment, and a sense of guilt welled up inside her. She had always suspected that Su Xiao had ulterior motives, but now he was working day and night to produce Stigmata Potions for the Revolutionary Army. Her conscience hurt badly.
"If there's nothing else, take these potions and leave."
"Uh..."
Koala's guilt vanished without a trace. She was even left speechless by Su Xiao and could only collect the Stigmata Potions from the metal table before leaving the room.
Bang!
The door slammed shut. Outside, Koala's lips opened and closed, but in the end, she could only walk away with an irritated look.
Su Xiao sat on the wooden bed in the room and opened the Alchemy skill tree to inspect the Plant Harmonization chapter.
``` Plant Harmonization Lv.8 (Proficiency: 304/80)
Lv.1 Unlocked Formula: Vitality Potion (Permanently increases Stamina