Cheapest priced copy (Prophecy): $0.35 at Card Kingdom, near mint, their price list as of .
Plague Fiend 
Creature — Insect · 1/1 · Common · Prophecy · #73
Whenever this creature deals combat damage to a creature, destroy that creature unless its controller pays {2}.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
1 printing · $0.35 to $0.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Prophecy | 73 | Common | $0.35 | $0.99 |
One ruling from Wizards of the Coast
- 4 October 2004The creature’s controller gets the option to pay when the triggered ability resolves.