[ObligatoryRef]

There have been a lot of attempts, including a recent wave from China. However, there are unique features about how the cards are printed that make it difficult to reproduce: cards bend in a certain way, use a proprietary font, have a strip embedded between the layers, etc. High quality fakes can fool some people, but not usually those who can afford to fork over hundreds or thousands for the really valuable cards.

(not to mention if you use fakes in sanctioned Magic and are caught, big penalties can ensue)