Easy Squirrel Easy Go

Discard a card: Create a 1/1 green squirrel creature token.
Sacrifice a Squirrel: Each opponent puts the top card of their library into their graveyard.
Sacrifice a Squirrel: Exile target card in any graveyard.
{3}{u/b}{b/g}, Sacrifice a Squirrel: Return target creature card from your graveyard to the battlefield under your control.