Fabrication Foundry [The Lost Caverns of Ixalan Prerelease Cards]

T: Add W. Spend this mana only to cast an artifact spell or activate an ability of an artifact source.

2W, T, Exile one or more other artifacts you control with total mana value X: Return target artifact card with mana value X or less from your graveyard to the battlefield. Activate only as a sorcery.