4c HollowOne wants to fill the graveyard fast with Burning Inquiry and Faithless Looting to cheat out Hollow One and recur Vengevine, and while none of our sideboard graveyard hate pieces are ideal (Endurance's evoke only shuffles one player's graveyard away, delaying but not stopping their engine for a turn), Consign to Memory can still counter colorless spells like Hollow One and key triggered abilities like Vengevine's recursion. Flare of Denial is the weakest interactive spell here since it does nothing against their proactive discard-and-recur plan and sacrificing a blue creature is a real cost against their fast clock, so it trims for the marginal upgrade. Keep the maindeck removal suite (Dismember, Sink into Stupor) in since Hollow One and Vengevine are real bodies that need to be answered before they attack.