Confidence:StrongSolidPlausibleTentativeSpeculative

• Humility

  2WW

  EnchantmentW

  Toughness wipe: one card sets every other creature's base toughness to 1 (or another small number), and the other repeatedly kills anything that small — a standing -1/-1, damage to each creature, or a pinger that untaps when a creature dies. Together they wipe the board and kill whatever enters after (once, if the toughness change only lasts the turn).
• Maha, Its Feathers Night

  3BB

  Legendary Creature — Elemental BirdB

  Toughness wipe: one card sets every other creature's base toughness to 1 (or another small number), and the other repeatedly kills anything that small — a standing -1/-1, damage to each creature, or a pinger that untaps when a creature dies. Together they wipe the board and kill whatever enters after (once, if the toughness change only lasts the turn).
• Overwhelming Splendor

  6WW

  Enchantment — Aura CurseW

  Toughness wipe: one card sets every other creature's base toughness to 1 (or another small number), and the other repeatedly kills anything that small — a standing -1/-1, damage to each creature, or a pinger that untaps when a creature dies. Together they wipe the board and kill whatever enters after (once, if the toughness change only lasts the turn).
• Godhead of Awe

  W/UW/UW/UW/UW/U

  Creature — Spirit AvatarUW

  Toughness wipe: one card sets every other creature's base toughness to 1 (or another small number), and the other repeatedly kills anything that small — a standing -1/-1, damage to each creature, or a pinger that untaps when a creature dies. Together they wipe the board and kill whatever enters after (once, if the toughness change only lasts the turn).
• Bloodline Recollector // Ancestral Craving

  1BB

  Creature — Vampire Warlock // InstantB

  Archfiend of Ifnir 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

  Archfiend of Ifnir 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

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

  B

  EnchantmentB

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

  G

  Enchantment — AuraG

  Archfiend of Ifnir can kill creatures (with damage or by shrinking them), enabling Bequeathal's death-trigger or removal payoff.
• Flame Blitz

  R

  EnchantmentR

  Flame Blitz has cycling, and Archfiend of Ifnir pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Unearth

  B

  SorceryB

  Unearth has cycling, and Archfiend of Ifnir pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Kraven the Hunter

  1BG

  Legendary Creature — Human Warrior VillainBG

  Archfiend of Ifnir 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

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

  2WW

  EnchantmentW

  Archfiend of Ifnir can kill creatures (with damage or by shrinking them), enabling Enduring Renewal's death-trigger or removal payoff.
• Decree of Annihilation

  8RR

  SorceryR

  Decree of Annihilation has cycling, and Archfiend of Ifnir pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Vedalken Aethermage

  1U

  Creature — Vedalken WizardU

  Vedalken Aethermage has cycling, and Archfiend of Ifnir pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Eater of Virtue

  1

  Legendary Artifact — EquipmentC

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

  1

  Artifact — EquipmentC

  Archfiend of Ifnir can kill creatures (with damage or by shrinking them), enabling Skullclamp's death-trigger or removal payoff.
• Unpredictable Cyclone

  3RR

  EnchantmentR

  Unpredictable Cyclone has cycling, and Archfiend of Ifnir pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Necropotence

  BBB

  EnchantmentB

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

  2B

  Creature — ImpB

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

  BB

  InstantB

  Archfiend of Ifnir can kill creatures (with damage or by shrinking them), enabling Malicious Affliction's death-trigger or removal payoff.
• Jolted Awake

  W

  SorceryW

  Jolted Awake has cycling, and Archfiend of Ifnir pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Conspiracy Theorist

  1R

  Creature — Human ShamanR

  Both cards trigger when a card is discarded — they fire together.
• Athreos, God of Passage

  1WB

  Legendary Enchantment Creature — GodBW

  Archfiend of Ifnir can kill creatures (with damage or by shrinking them), enabling Athreos, God of Passage's death-trigger or removal payoff.