Shuri's Fabricator is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

When this artifact enters, create two tapped Vibranium tokens. (They're artifacts with indestructible and ": Add . This mana can't be spent to cast a nonartifact spell.") , : Return target artifact card from your graveyard to the battlefield with a finality counter on it. Activate only as a sorcery. (If a permanent with a finality counter on it would be put into a graveyard, exile it instead.)