Cheapest priced copy (Guilds of Ravnica): $0.35 at Card Kingdom, near mint, their price list as of .
Whispering Snitch 
Creature — Vampire Rogue · 1/3 · Uncommon · Guilds of Ravnica · #90
Whenever you surveil for the first time each turn, this creature deals 1 damage to each opponent and you gain 1 life.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Guilds of Ravnica | 90 | Uncommon | $0.35 | $0.49 |
| Murders at Karlov Manor Commander | 144 | Uncommon | $0.35 | — |
3 rulings from Wizards of the Coast
- 5 October 2018If you surveil before Whispering Snitch enters the battlefield, surveilling again during that turn won't cause its ability to trigger.
- 5 October 2018In a Two-Headed Giant game, Whispering Snitch's ability causes the opposing team to lose 2 life and you gain 1 life.
- 12 January 2024An ability that triggers "whenever you surveil" triggers after you're done surveilling, even if you have fewer cards in your library than the number of cards you're instructed to surveil. It even triggers if you have no cards in your library.