Destroying up to five permanents for six mana is the definition of value
Trying to keep pace with the agro decks using pure card draw effects and efficient answers simply doesn't work, the card draw is not cost appropriately to do this

Acornelia, Fashionable Filcher Armix, Filigree Thrasher Ashcoat of the Shadow Swarm Ashcoat of the Shadow Swarm Bane of the Living Battle at the Bridge Black Sun's Twilight Blight-Breath Catoblepas Bloodthirsty Ogre Call for Blood Cemetery Desecrator Chainer's Torment Chill Haunting Chupacabra Echo Cloudkill Corpseweft Dead of Winter Death Wind Death's Approach Death's Shadow Deluge of Doom Drag to the Bottom Drana's Silencer Erebos's Intervention Essence Pulse Faerie Fencing Feeding Frenzy Festive Funeral Flesh Carver Flunk Foul Renewal Grim Hireling Gumdrop Poisoner Gumdrop Poisoner Hancock, Ghoulish Mayor Ichor Explosion Induce Despair Kagemaro's Clutch Kagemaro, First to Suffer Krumar Initiate Liliana of the Dark Realms Liliana, Untouched by Death Liliana, Waker of the Dead Lys Alana Scarblade Necropolis Fiend Necrotic Wound Nighthowler Nightmare's Thirst Nightmarish End Nightshade Assassin Nightshade Seer Nuclear Fallout Olivia's Wrath Pact Weapon Painbringer Planeswalker's Scorn Priest of the Haunted Edge Profane Command Profane Transfusion Promise of Power Putrid Cyclops Raffine's Silencer Reign of the Pit Retribution of the Ancients Scavenger Regent Scavenger Regent Scent of Nightshade Sickening Shoal Skullmane Baku Slice from the Shadows Specter of Mortality Spoils of Blood

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Bitterblossoms strength lies in its versatility
If Zulaport Cutthroat is on the battlefield and you can't get rid of it, the game is likely already decided