Not specifically lore for the PM, this is to world build some. Everything you need to know about extradonarias are down below Have any questions? Ask me down below and I will add an extended answer in the notes and credits after a while.
An extradonaria is an artificial organ certain people have, it lets them contain powers. If blood is extracted from it, then that person loses all of their powers. Unless they still have some blood left in their extradonaria, but they are in a weakened state. If you import blood from someones extradonaria into yours, then you gain their powers. You can only have an extradonaria if you have O- blood type. If you have an extradonaria, it will automatically make more O- blood for itself, think of it like a second heart. You CANNOT get one of these naturally, if you do then you must make a reason, then tell me the reason, and then I MIGHT approve of it because it doesn't break any lore or other stuff. (I can also say no because it IS my lore) A company would make these, the name is currently disclosed, but you can take your guesses, and the company is (Pretty much) all dead, there might be a few workers here and there. You need to be a human to get an extradonaria, they tried to put one in other organisms but they failed, time and time again.