Cheapest priced copy (Stronghold): $17.99 at Card Kingdom, near mint, their price list as of .
Volrath's Shapeshifter 
Creature — Phyrexian Shapeshifter · 0/1 · Rare · Stronghold · #48
As long as the top card of your graveyard is a creature card, this creature has the full text of that card and has the text "{2}: Discard a card." (This creature has that card's name, mana cost, color, types, abilities, power, and toughness.)
{2}: Discard a card.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $17.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Stronghold | 48 | Rare | $17.99 | — |
6 rulings from Wizards of the Coast
- 4 October 2004If 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.
- 4 October 2004If 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.
- 4 October 2004If 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.
- 4 October 2004A copy of a Volrath's Shapeshifter will have the shapeshifting ability.
- 4 October 2004When it changes forms, any "enters" abilities of the card it "copies" do not trigger.
- 1 August 2008The ability that sets its characteristics is a text-changing effect.