Confidence:StrongSolidPlausibleTentativeSpeculative

• Abyssal Harvester

  1BB

  Creature — Demon WarlockB

  Both cards produce the same kind of effect (shared token subtype).
• Ashiok, Nightmare Muse

  3UB

  Legendary Planeswalker — AshiokBU

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

  2BB

  Enchantment Creature — DemonB

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

  3B

  Enchantment — SagaB

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

  3

  ArtifactC

  Ashiok, Wicked Manipulator has activated abilities that aren't mana abilities, fueling Rings of Brighthearth's activation-trigger.