Your opponents can't gain life.
At the beginning of your upkeep, Quakebringer deals 2 damage to each opponent. This ability triggers only if Quakebringer is on the battlefield or if Quakebringer is in your graveyard and you control a Giant.
Foretell 

(During your turn, you may pay
and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)