This deck's entire plan runs through Hermit Druid filling its graveyard and then Unearth or Animate Dead reanimating a combo piece, which makes Haunting Echoes devastating — it strips their graveyard and exiles the matching library copies of whatever they've committed. Aura of Silence taxes enchantment spells like Survival of the Fittest and Animate Dead while offering a sacrifice effect to destroy them, slowing their combo assembly. Enlightened Tutor finds whichever answer you need most, whether that's a fresh Aura of Silence or Seal of Cleansing. Duress is weaker here since key engine creatures like Hermit Druid cannot be discarded with it, so two copies come out along with the situational Funeral Charm and Phyrexian Furnace.