Artifact is a permanent card type. You cast an artifact spell during a main phase when the stack is empty, paying its mana cost. When it resolves, it enters the battlefield and remains there until it leaves, providing its effect for as long as it stays. Most artifacts are colorless, though some have colored mana costs or color indicators.
In a deck, artifacts often supply mana acceleration, utility, or equipment. They are flexible tools that fit into many strategies. Some artifacts also have additional card types, but as a type, an artifact is defined by being cast and then remaining on the battlefield.
