Confidence:StrongSolidPlausibleTentativeSpeculative

• Demonic Covenant

  4BB

  Kindred Enchantment — DemonB

  Both cards produce the same kind of effect (shared token subtype).
• Hazel of the Rootbloom

  2BG

  Legendary Creature — Squirrel DruidBG

  Ob Nixilis of the Black Oath gains life in big chunks or many small hits, fueling Hazel of the Rootbloom's life-gain payoff.
• Professor Dellian Fel

  2BG

  Legendary Planeswalker — DellianBG

  Ob Nixilis of the Black Oath gains life in big chunks or many small hits, fueling Professor Dellian Fel's life-gain payoff.
• Promise of Power

  2BBB

  SorceryB

  Both cards produce the same kind of effect (shared token subtype).
• Inquisitor Eisenhorn

  2UB

  Legendary Creature — Human InquisitorBU

  Both cards produce the same kind of effect (shared token subtype).
• Griselbrand

  4BBBB

  Legendary Creature — DemonB

  Ob Nixilis of the Black Oath gains life in big chunks or many small hits, fueling Griselbrand's life-gain payoff.
• Tasha, the Witch Queen

  3UB

  Legendary Planeswalker — TashaBU

  Both cards produce the same kind of effect (shared token subtype).
• Great Unclean One

  4B

  Creature — DemonB

  Both cards produce the same kind of effect (shared token subtype).
• Clavileño, First of the Blessed

  1WB

  Legendary Creature — Vampire ClericBW

  Both cards produce the same kind of effect (shared token subtype).
• Unholy Annex // Ritual Chamber

  2B3BB

  Enchantment — Room // Enchantment — RoomB

  Both cards produce the same kind of effect (shared token subtype).
• Archfiend's Vessel

  B

  Creature — Human ClericB

  Both cards produce the same kind of effect (shared token subtype).
• Toxic Deluge

  2B

  SorceryB

  Ob Nixilis of the Black Oath gains life in big chunks or many small hits, fueling Toxic Deluge's life-gain payoff.
• Aetherflux Reservoir

  4

  ArtifactC

  Ob Nixilis of the Black Oath gains life in big chunks or many small hits, fueling Aetherflux Reservoir's life-gain payoff.
• Nazar, the Velvet Fang

  3B

  Legendary Creature — Vampire WarlockB

  Ob Nixilis of the Black Oath gains life in big chunks or many small hits, fueling Nazar, the Velvet Fang's life-gain payoff.
• Karlov of the Ghost Council

  WB

  Legendary Creature — Spirit AdvisorBW

  Ob Nixilis of the Black Oath gains life in big chunks or many small hits, fueling Karlov of the Ghost Council's life-gain payoff.
• Lithoform Blight

  1B

  Enchantment — AuraB

  Ob Nixilis of the Black Oath gains life in big chunks or many small hits, fueling Lithoform Blight's life-gain payoff.
• Promise of Aclazotz // Foul Rebirth

  1B2B

  Enchantment // Sorcery — AdventureB

  Both cards produce the same kind of effect (shared token subtype).
• Amalia Benavides Aguirre

  WB

  Legendary Creature — Vampire ScoutBW

  Ob Nixilis of the Black Oath gains life in big chunks or many small hits, fueling Amalia Benavides Aguirre's life-gain payoff.
• Trudge Garden

  2G

  EnchantmentG

  Ob Nixilis of the Black Oath gains life in big chunks or many small hits, fueling Trudge Garden's life-gain payoff.
• Resplendent Angel

  1WW

  Creature — AngelW

  Ob Nixilis of the Black Oath gains life in big chunks or many small hits, fueling Resplendent Angel's life-gain payoff.
• Forsworn Paladin

  B

  Creature — Human KnightB

  Ob Nixilis of the Black Oath gains life in big chunks or many small hits, fueling Forsworn Paladin's life-gain payoff.
• Glass-Cast Heart

  2B

  ArtifactB

  Ob Nixilis of the Black Oath gains life in big chunks or many small hits, fueling Glass-Cast Heart's life-gain payoff.
• Mystic Forge

  4

  ArtifactC

  Ob Nixilis of the Black Oath gains life in big chunks or many small hits, fueling Mystic Forge's life-gain payoff.
• Pink Horror

  3UR

  Creature — Demon HorrorRU

  Both cards produce the same kind of effect (shared token subtype).
• Stirge

  B

  Creature — Insect BatB

  Ob Nixilis of the Black Oath gains life in big chunks or many small hits, fueling Stirge's life-gain payoff.