Vicious Rumors

• WWizards of the Coast2018-10-05
  Official Ruling
  In 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.
• WWizards of the Coast2018-10-05
  Official Ruling
  As 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.

Rulings via Scryfall