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Transmute Artifact

Sacrifice an artifact. If you do, search your library for an artifact card. If that card's mana value is less than or equal to the sacrificed artifact's mana value, put it onto the battlefield. If it's greater, you may pay {X}, where X is the difference. If you do, put it onto the battlefield. If you don't, put it into its owner's graveyard. Then shuffle.

Masters Edition IV

Sacrifice an artifact. If you do, search your library for an artifact card. If that card's converted mana cost is less than or equal to the sacrificed artifact's converted mana cost, put it onto the battlefield. It it's greater, you may pay {X}, where X is the difference. If you do, put it onto the battlefield. If you don't, put it into its owner's graveyard. Then shuffle your library.

Antiquities

Search through your library for one artifact and immediately place it into play; also, choose any artifact in play that you control and place it in its owner's graveyard. If the new artifact has a casting cost greater than that of the discarded one, you must pay the difference or Transmute Artifact fails and both artifacts are discarded. Shuffle your library after playing this card.