Confidence:StrongSolidPlausibleTentativeSpeculative

• Bloodline Recollector // Ancestral Craving

  1BB

  Creature — Vampire Warlock // InstantB

  Runaway Boulder can kill creatures (with damage or by shrinking them), enabling Bloodline Recollector's death-trigger or removal payoff.
• Chevill, Bane of Monsters

  BG

  Legendary Creature — Human RogueBG

  Runaway Boulder can kill creatures (with damage or by shrinking them), enabling Chevill, Bane of Monsters's death-trigger or removal payoff.
• Private Research

  U

  Enchantment — AuraU

  Runaway Boulder can kill creatures (with damage or by shrinking them), enabling Private Research's death-trigger or removal payoff.
• Quest for the Gravelord

  B

  EnchantmentB

  Runaway Boulder can kill creatures (with damage or by shrinking them), enabling Quest for the Gravelord's death-trigger or removal payoff.
• Bequeathal

  G

  Enchantment — AuraG

  Runaway Boulder can kill creatures (with damage or by shrinking them), enabling Bequeathal's death-trigger or removal payoff.
• Kraven the Hunter

  1BG

  Legendary Creature — Human Warrior VillainBG

  Runaway Boulder can kill creatures (with damage or by shrinking them), enabling Kraven the Hunter's death-trigger or removal payoff.
• Lagomos, Hand of Hatred

  1BR

  Legendary Creature — Human ShamanBR

  Runaway Boulder can kill creatures (with damage or by shrinking them), enabling Lagomos, Hand of Hatred's death-trigger or removal payoff.
• Enduring Renewal

  2WW

  EnchantmentW

  Runaway Boulder can kill creatures (with damage or by shrinking them), enabling Enduring Renewal's death-trigger or removal payoff.
• Currency Converter

  1

  ArtifactC

  Runaway Boulder has cycling, and Currency Converter pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Eater of Virtue

  1

  Legendary Artifact — EquipmentC

  Runaway Boulder can kill creatures (with damage or by shrinking them), enabling Eater of Virtue's death-trigger or removal payoff.
• Skullclamp

  1

  Artifact — EquipmentC

  Runaway Boulder can kill creatures (with damage or by shrinking them), enabling Skullclamp's death-trigger or removal payoff.
• Necropotence

  BBB

  EnchantmentB

  Runaway Boulder has cycling, and Necropotence pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Stinkweed Imp

  2B

  Creature — ImpB

  Runaway Boulder has cycling, and Stinkweed Imp pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Malicious Affliction

  BB

  InstantB

  Runaway Boulder can kill creatures (with damage or by shrinking them), enabling Malicious Affliction's death-trigger or removal payoff.
• Athreos, God of Passage

  1WB

  Legendary Enchantment Creature — GodBW

  Runaway Boulder can kill creatures (with damage or by shrinking them), enabling Athreos, God of Passage's death-trigger or removal payoff.
• Emeritus of Woe // Demonic Tutor

  3B1B

  Creature — Vampire Warlock // SorceryB

  Runaway Boulder can kill creatures (with damage or by shrinking them), enabling Emeritus of Woe's death-trigger or removal payoff.
• Ob Nixilis, Unshackled

  4BB

  Legendary Creature — DemonB

  Runaway Boulder can kill creatures (with damage or by shrinking them), enabling Ob Nixilis, Unshackled's death-trigger or removal payoff.
• Glissa, the Traitor

  BGG

  Legendary Creature — Phyrexian Zombie ElfBG

  Runaway Boulder can kill creatures (with damage or by shrinking them), enabling Glissa, the Traitor's death-trigger or removal payoff.
• Incendiary

  R

  Enchantment — AuraR

  Runaway Boulder can kill creatures (with damage or by shrinking them), enabling Incendiary's death-trigger or removal payoff.
• The Meathook Massacre

  XBB

  Legendary EnchantmentB

  Runaway Boulder can kill creatures (with damage or by shrinking them), enabling The Meathook Massacre's death-trigger or removal payoff.
• Sticky Fingers

  R

  Enchantment — AuraR

  Runaway Boulder can kill creatures (with damage or by shrinking them), enabling Sticky Fingers's death-trigger or removal payoff.
• Assault Intercessor

  1WB

  Creature — Astartes WarriorBW

  Runaway Boulder can kill creatures (with damage or by shrinking them), enabling Assault Intercessor's death-trigger or removal payoff.
• Midnight Oil

  2BB

  EnchantmentB

  Runaway Boulder has cycling, and Midnight Oil pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Nurgle's Rot

  B

  Enchantment — AuraB

  Runaway Boulder can kill creatures (with damage or by shrinking them), enabling Nurgle's Rot's death-trigger or removal payoff.
• Insidious Roots

  BG

  EnchantmentBG

  Runaway Boulder has cycling, and Insidious Roots pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.