Cheapest priced copy (Betrayers of Kamigawa): $0.35 at Card Kingdom, near mint, their price list as of .
Ogre Marauder 
Creature — Ogre Warrior · 3/1 · Uncommon · Betrayers of Kamigawa · #75
Whenever this creature attacks, it gains "this creature can't be blocked" until end of turn unless defending player sacrifices a creature of their choice.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
1 printing · $0.35 to $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Betrayers of Kamigawa | 75 | Uncommon | $0.35 | $0.79 |
2 rulings from Wizards of the Coast
- 1 February 2005Ogre Marauder’s ability requires the defending player to sacrifice a creature as the ability resolves, or Ogre Marauder can’t be blocked for the rest of the turn.
- 1 February 2005Attacking with Ogre Marauder a second time would cause a second trigger. If no creature was previously sacrificed, the Marauder already can’t be blocked. Sacrificing a creature for the second trigger will not nullify the first.