Cheapest priced copy (Duel Decks: Phyrexia vs. the Coalition): $0.35 at Card Kingdom, near mint, their price list as of .
Phyrexian Totem 
Artifact · Uncommon · Time Spiral · #261
{T}: Add {B}.
{2}{B}: This artifact becomes a 5/5 black Phyrexian Horror artifact creature with trample until end of turn.
Whenever this permanent is dealt damage, if it's a creature, sacrifice that many permanents.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Duel Decks: Phyrexia vs. the Coalition | 20 | Uncommon | $0.35 | — |
| Time Spiral | 261 | Uncommon | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 25 September 2006When damage is dealt to Phyrexian Totem, its triggered ability will trigger. A number of permanents equal to the amount of damage dealt will be sacrificed when the ability resolves. It doesn't matter if Phyrexian Totem isn't on the battlefield when the ability resolves, as long as Phyrexian Totem was a creature as it left the battlefield. If one of the permanents sacrificed is Phyrexian Totem itself, the requisite number of other permanents must still be sacrificed.
- 1 August 2008A noncreature permanent that turns into a creature can attack, and its {T} abilities can be activated, only if its controller has continuously controlled that permanent since the beginning of their most recent turn. It doesn't matter how long the permanent has been a creature.