Purchasing counterfeits often hurts Local Game Stores (LGS) and contributes to the circulation of fraudulent items in the secondary market.

A counterfeit aims to pass as authentic, often using "blue core" paper. A proxy is a substitute, often with custom artwork or clearly marked "not real," which many players find acceptable for casual play.

While some fakes are high quality, they often fail specific tests: Identifying Fake Magic: the Gathering Cards - Facebook

Using counterfeit cards in sanctioned tournaments is prohibited and constitutes cheating.