Cheapest priced copy (Jumpstart): $0.35 at Card Kingdom, near mint, their price list as of .
Drainpipe Vermin 
Creature — Rat · 1/1 · Common · Return to Ravnica · #66
When this creature dies, you may pay {B}. If you do, target player discards a card.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Jumpstart | 224 | Common | $0.35 | — |
| Return to Ravnica | 66 | Common | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 1 October 2012You may pay {B} only once. The target player will discard a maximum of one card because of Drainpipe Vermin’s ability.