, 
, Sacrifice an artifact: Return target artifact card with mana value 3 or less from your graveyard to the battlefield.No reference price for this printing yet: not enough stores to make an average.
Run a comparison: we query the stores live, it may have arrived this morning.
Because targets are chosen for activated abilities before costs (such as "Sacrifice an artifact") are paid, Goblin Engineer's second ability can't target the artifact that will be sacrificed to pay its cost.
2021-03-19 · Wizards of the CoastIf a card in a player's graveyard has {X} in its mana cost, X is considered to be 0.
2021-03-19 · Wizards of the Coast
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