The sap from the same kind of Plant that almost all "poor" families now had access to thanks to the methods Ren had released, democratizing access to resources that now were needed even by nobility.
Ren knew exactly how they'd discovered the process thanks to Wei's enthusiastic experimentation.
Almost two years ago, someone with mana eyes had accidentally gotten their face stained with elemental plant sap during a battle. And the sap, which was normally transparent like water, had turned reddish with the mana the person was using in their eyes when they'd shouted a taunt at their opponent, color changing thanks to the invisible energy.
Wei had heard about the incident and, as Wei did with everything lately… he'd begun experimenting immediately, seeing potential where others saw only a weird reaction of mana in the "new beasts".
