Marc: makes sense, many magical swords you can just buy can do that, though umm. A ice make shield is physical not magical. But you could break through magical ones, like invisible walls or energy barriers which are common. 

malmshodes: Hmm. Well it would not be just copper, it would have Lacrima in it and maybe work like a cannon. Which in of itself is pretty cool as the doll itself has no magical abilities apart from parts. Of course Lacrima can break from very powerful spells, of course I think I can trust you not to be able to capture a abyss break XD

http://fairytail.wikia.com/wiki/Lacrima

FYI this is also what Melody's beads are made out of.