Volrath's Shapeshifter

Text:

As long as the top card of your graveyard is a creature card, Volrath's Shapeshifter has the full text of that card and has the text ": Discard a card." (Volrath's Shapeshifter has that card's name, mana cost, color, types, abilities, power, and toughness.)
: Discard a card.

Rulings:

• 10/4/2004 If the top card in the graveyard has any other undefined characteristics, then those characteristics are not acquired and the shapeshifter uses the characteristic from its own card.
• 10/4/2004 If the top card in your graveyard is a creature card, this card uses the listed characteristics, including color and any other types. But, this card keeps the granted ability in addition to those from the card being copied.
• 10/4/2004 When it changes forms, any “enters the battlefield” abilities of the card it “copies” do not trigger.
• 10/4/2004 A copy of a Volrath’s Shapeshifter will have the shapeshifting ability.
• 10/4/2004 If the top card in your graveyard isn’t a creature card (meaning a card with the type Creature, which may or may not have other types such as Artifact or Enchantment), then it’s just a 0/1 blue creature. Older cards of type Summon are also Creature cards.
• 8/1/2008 The ability that sets its characteristics is a text-changing effect.