With storage disappearing, I turned to look at the blood poison lily; it is the most precious flower Ive ever got my hands on.
It is more precious than the fire dust rose and even metal essence fruits; like both of those things, its constitution sub-class resources, means it could change one's the constitution, and the constitution it gives is much more powerful than those two resources above.
In many ways, it is different than them and more dangerous if used with the slightest negligence, and most importantly, it could be used on only those who have the poison constitution already. Those without poison constitution could also use it, but they would not gain even 10% of its benefits.
The way old Foxman had used the blood poison lily is extremely dangerous but also genius. While it fed it its blood essence, the blood poison lily also gave back some of its essences return, making its constitution stronger.