Confidence:StrongSolidPlausibleTentativeSpeculative

• Rodolf Duskbringer

  5B

  Legendary Creature — Vampire AngelBW

  Lifegain pair: one card gains life while the other rewards lifegain. They reinforce each other in a lifegain deck.
• Fiendish Panda

  2WB

  Creature — Bear DemonBW

  Lifegain pair: one card gains life while the other rewards lifegain. They reinforce each other in a lifegain deck.
• Baron Helmut Zemo

  BBB

  Legendary Creature — Human Noble VillainB

  Copy engine: one card makes a copy of a creature every turn, and the other's enter-the-battlefield effect rewards each copy. Real, repeatable value — the partner can't untap or re-enter the copier, so it never goes infinite.
• Norman Osborn // Green Goblin

  1U1UBR

  Legendary Creature — Human Scientist Villain // Legendary Creature — Goblin Human VillainBRU

  Migrating Ketradon has cycling, and Norman Osborn pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Currency Converter

  1

  ArtifactC

  Migrating Ketradon has cycling, and Currency Converter pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Tinybones, Trinket Thief

  1B

  Legendary Creature — Skeleton RogueB

  Migrating Ketradon has cycling, and Tinybones, Trinket Thief pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Teferi, Temporal Pilgrim

  3UU

  Legendary Planeswalker — TeferiU

  Migrating Ketradon has cycling, and Teferi, Temporal Pilgrim pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Ob Nixilis Reignited

  3BB

  Legendary Planeswalker — NixilisB

  Migrating Ketradon has cycling, and Ob Nixilis Reignited pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Red Ghost, Intangible Genius

  2UR

  Legendary Creature — Human Scientist VillainRU

  Migrating Ketradon has cycling, and Red Ghost, Intangible Genius pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Stinkweed Imp

  2B

  Creature — ImpB

  Migrating Ketradon has cycling, and Stinkweed Imp pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• The Rise of Sozin // Fire Lord Sozin

  4BB

  Enchantment — Saga // Legendary Creature — Human NobleB

  Migrating Ketradon has cycling, and The Rise of Sozin pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Sheoldred, the Apocalypse

  2BB

  Legendary Creature — Phyrexian PraetorB

  Migrating Ketradon has cycling, and Sheoldred, the Apocalypse pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Kid Loki

  U

  Legendary Creature — God Hero VillainU

  Migrating Ketradon has cycling, and Kid Loki pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Midnight Oil

  2BB

  EnchantmentB

  Migrating Ketradon has cycling, and Midnight Oil pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Kami of the Crescent Moon

  UU

  Legendary Creature — SpiritU

  Migrating Ketradon has cycling, and Kami of the Crescent Moon pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Niv-Mizzet, Parun

  UUURRR

  Legendary Creature — Dragon WizardRU

  Migrating Ketradon has cycling, and Niv-Mizzet, Parun pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Mirrorhall Mimic // Ghastly Mimicry

  3U

  Creature — Spirit // Enchantment — AuraU

  One-shot copy enabler: a card enters as a copy of another (Phantasmal Image, Body Double, Phyrexian Metamorph), firing the partner's substantive ETB once. Not a repeating chain — fires once on entry — but valuable when the partner's ETB is combo-grade (graveyard reanimator, mana doubler, etc.).
• Lazotep Chancellor

  UB

  Creature — Zombie WizardBU

  Migrating Ketradon has cycling, and Lazotep Chancellor pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Jolrael, Mwonvuli Recluse

  1G

  Legendary Creature — Human DruidG

  Migrating Ketradon has cycling, and Jolrael, Mwonvuli Recluse pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Irencrag Pyromancer

  2R

  Creature — Human WizardR

  Migrating Ketradon has cycling, and Irencrag Pyromancer pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• The Raven Man

  1B

  Legendary Creature — Human WizardB

  Migrating Ketradon has cycling, and The Raven Man pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Necroplasm

  1BB

  Creature — OozeB

  Migrating Ketradon has cycling, and Necroplasm pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Mischievous Mystic

  1U

  Creature — Human WizardU

  Migrating Ketradon has cycling, and Mischievous Mystic pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Niv-Mizzet, the Firemind

  2UURR

  Legendary Creature — Dragon WizardRU

  Migrating Ketradon has cycling, and Niv-Mizzet, the Firemind pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.
• Daughter of the Deep

  1U

  Creature — Merfolk NobleU

  Migrating Ketradon has cycling, and Daughter of the Deep pays off whenever a card is cycled — the Astral Slide / Lightning Rift engine shape.