Master's Guide-Mural // Master's Manufactory

If the materials required include multiple objects, you may exile some of them from among permanents you control and the rest from among cards in your graveyard. You don't have to choose all permanents or all cards from your graveyard.

The back faces of some cards with craft refer to cards "used to craft" it. This refers to the cards exiled as part of the cost of the craft ability of the front face. Those cards are considered to be "used to craft" that permanent as long as they remain exiled and the permanent remains on the battlefield, even if the permanent's controller changes or some of its characteristics change (because of a copy effect, for example.)

The ability of Master's Manufactory can be activated no matter what happened to the artifact after it entered under your control. It may have left the battlefield, stopped being an artifact, or another player may have gained control of it.