Marsela, the Mage Whisper

Whenever a spell or ability you control counters a spell, player puts the top four cards of their library into their graveyard.
Whenever an opponent puts the cards of their library into their graveyard, that player loses 1 life and you gain 1 life.
{2}{u}{b},{t}:Each opponent puts the top two cards of their library into their graveyard.