Cheapest priced copy (Zendikar): $0.49 at Card Kingdom, near mint, their price list as of .
World Queller 
Creature — Avatar · 4/4 · Rare · Zendikar · #39
At the beginning of your upkeep, you may choose a card type. If you do, each player sacrifices a permanent of their choice of that type.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
1 printing · $0.49 to $0.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Zendikar | 39 | Rare | $0.49 | $0.99 |
3 rulings from Wizards of the Coast
- 1 October 2009First you choose which permanent you'll sacrifice (if you control any of the chosen type), then each other player in turn order does the same, then all chosen permanents are sacrificed at the same time.
- 1 October 2009You don't choose a card type until the ability resolves. Once you choose a type, it's too late for players to respond.
- 1 July 2013You may choose any card type. Choosing anything other than artifact, battle, creature, enchantment, kindred, land, or planeswalker will result in no permanents being sacrificed, though, since these are the only types permanents can have.