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: Add . Spend this mana only to cast an artifact spell or activate an ability of an artifact source.
, , Exile one or more other artifacts you control with total mana valuemana valueThe total amount of mana in a card's cost, ignoring colour. A card costing 
has mana value 4. X counts as 0 except on the stack. X: Return target artifact card with mana valuemana valueThe total amount of mana in a card's cost, ignoring colour. A card costing has mana value 4. X counts as 0 except on the stack. X or less from your graveyard to the battlefield. Activate only as a sorcery.
Hover an underlined rule to see what it means.
Read from the rules text. A card that enables a keyword makes or is the thing; a card that rewards it gets better when you have it. Two cards interact when one enables what the other rewards.
