Splinter

Exile target artifact. Search its controller's graveyard, hand, and library for all cards with the same name as that artifact and exile them. Then that player shuffles.

Betrayers of Kamigawa

Remove target artifact from the game. Search its controller's graveyard, hand, and library for all cards with the same name as that artifact and remove them from the game. That player then shuffles his or her library.

World Championship Decks 2000

Urza's Destiny

Remove target artifact from the game. Search its controller's graveyard, hand, and library for all copies of that card and remove them from the game. That player then shuffles his or her library.

Does not exile other cards of the same name that are on the battlefield. Just from the graveyard, hand, and library.

Splinter can target and exile cards that aren’t always artifacts, but are artifacts when Splinter is cast and resolves (such as an animated Stalking Stones). Splinter’s exile effect only looks for cards by name, not type.

The copies must be found if they are in publicly viewable zones. Finding copies while searching private zones is optional.