Scour

Instant    (CMC:4)

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

20 BOK • ENIttoku

™ & © 1993—2005 Wizards of the Coast

Legal in: Modern,Kamigawa Block,Urza Block,Legacy,Vintage,Freeform,Prismatic,Tribal Wars Legacy,Singleton 100,Commander

Oracle Text (click to copy):

10/4/2004
Does not exile other cards of the same name that are on the battlefield. Just from the graveyard, hand, and library.
2/1/2005
Scour can target and exile cards that aren't always enchantments, but are enchantments when Scour is cast and resolves (such as creatures turned into enchantments by Soul Sculptor). Scour's exile effect only looks for cards by name, not type.
2/1/2005
The copies must be found if they are in publicly viewable zones. Finding copies while searching private zones is optional.