I'm sure siphoning off some magical energy completely rendered it inert, and the doomsday material it is made out of has no negative effects what so ever .. Not to mention the impact such an object would have on the planet in the first place.
Also don't get me started on the wound that is "plugged" yet she bleeds out of every crack all across the globe anyway and barely at the stabbing point.. All we did was collect her blood and.. well let her/Magni&MOTHER spend it nuking N'Zoth.