Resources

Magic: The Gathering Oracle Changes

Masters Edition to Lorwyn (Single Change View)

New cards

Old card (Masters Edition) New card (Lorwyn)

Colfenor's Urn

{3}

Artifact

Whenever a creature with toughness 4 or greater is put into your graveyard from play, you may remove it from the game.

At end of turn, if three or more cards have been removed from the game with Colfenor's Urn, sacrifice it. If you do, return those cards to play under their owner's control.