Yeah, as TLoJ said above me, the best method is to obtain some Chateau Romani. Infinite magic power ftw. And then keep hacking away at its tails once it pops out of the ground...
On a side note, if you need 200 rupees for the chateau romani, best thing to do is wear the stone mask, and kill that Takkuri with fire arrows/arrows, near Milk Road. You get a huge orange rupee every time! Then just wait for the Milk Bar to open, and go in and buy some CR. Piece of cake :3