Cheapest priced copy (Guilds of Ravnica): $0.99 at Card Kingdom, near mint, their price list as of .
Vicious Rumors 
Sorcery · Common · Guilds of Ravnica · #89
Vicious Rumors deals 1 damage to each opponent. Each opponent discards a card, then mills a card. You gain 1 life.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
1 printing · $0.99 to $7.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Guilds of Ravnica | 89 | Common | $0.99 | $7.99 |
2 rulings from Wizards of the Coast
- 5 October 2018In a Two-Headed Giant game, Vicious Rumors causes the opposing team to lose 2 life, each of those players discards a card and puts the top card of their library into their graveyard, and you gain 1 life.
- 5 October 2018As Vicious Rumors resolves, it deals 1 damage to each opponent, then the next opponent in turn order (or, if it’s an opponent’s turn, that opponent) chooses a card in hand without revealing it, then each other opponent in turn order does the same. Then the chosen cards are discarded at the same time. Next, each opponent puts the top card of their library into their graveyard at the same time. Finally, you gain 1 life.