Dimir Tempo has no graveyard hate in its main deck, so Leyline of the Void is strong here. If it's in your opening hand it starts on the battlefield without being cast, which sidesteps Force of Will and Daze. It also exiles their cards instead of letting them reach their graveyard, which stunts Nethergoyf and its escape. Bridge from Below is weak here since it mostly matters when you're racing, not when you're fighting through Force of Will and Daze; cut it since the Zombie tokens won't close games against a deck that can just Wasteland your mana or counter your payoff. The extra Unmask helps strip their Force of Will or removal before you commit to your graveyard plan. Keep Cabal Therapy in to rip Force of Will or Thoughtseize before they can use it.