Artifact, 5 (5) {5}, {T}, Remove Ring of Ma'ruf from the game: The next time you would draw a card this turn, instead choose a card you own from outside the game and put it into your hand.1
Illus. Dan Frazier
The ability is a replacement ability (see Rule 419). It modifies your next draw. [D'Angelo 2000/02/25]
You do need to reveal the card you acquire to your opponent. [Aahz 1996/06/13]
In tournament play, this card can only bring in cards that are in your sideboard or that were removed from game due to a spell or ability. [D'Angelo 2003/08/01]
Extended tournaments (see Rule 803) have always banned this card.
Note - It is of type "Artifact", not "Mono Artifact". [Oracle 1998/07/01]