Confidence:StrongSolidPlausibleTentativeSpeculative

• Sage of Hours

  1U

  Creature — Human WizardU

  Counter synergy: both cards work with the same kind of counters, so their effects stack in a counters deck. Not necessarily a closed loop on its own.
• Teferi, Temporal Pilgrim

  3UU

  Legendary Planeswalker — TeferiU

  Draw pair: both cards engage with card draw. With a damage-or-draw trigger between them they form a draw engine.
• Etched Oracle

  4

  Artifact Creature — WizardC

  Counter synergy: both cards work with the same kind of counters, so their effects stack in a counters deck. Not necessarily a closed loop on its own.
• Sisterhood of Karn

  1G

  Creature — ClericG

  Counter synergy: both cards work with the same kind of counters, so their effects stack in a counters deck. Not necessarily a closed loop on its own.
• Dragonsguard Elite

  1G

  Creature — Human DruidG

  Counter synergy: both cards work with the same kind of counters, so their effects stack in a counters deck. Not necessarily a closed loop on its own.
• Shang-Chi and the Ten Rings

  1WU

  Legendary Creature — Human Warrior HeroUW

  Draw pair: both cards engage with card draw. With a damage-or-draw trigger between them they form a draw engine.
• Kinetic Ooze

  XG

  Creature — OozeG

  Counter synergy: both cards work with the same kind of counters, so their effects stack in a counters deck. Not necessarily a closed loop on its own.
• Benevolent Hydra

  XGG

  Creature — HydraG

  Counter synergy: both cards work with the same kind of counters, so their effects stack in a counters deck. Not necessarily a closed loop on its own.
• Lily Bowen, Raging Grandma

  3G

  Legendary Creature — Mutant WarriorG

  Counter synergy: both cards work with the same kind of counters, so their effects stack in a counters deck. Not necessarily a closed loop on its own.
• Big Mother Mouser

  4

  Artifact Creature — RobotC

  Counter synergy: both cards work with the same kind of counters, so their effects stack in a counters deck. Not necessarily a closed loop on its own.
• Kalonian Hydra

  3GG

  Creature — HydraG

  Counter synergy: both cards work with the same kind of counters, so their effects stack in a counters deck. Not necessarily a closed loop on its own.
• Mossborn Hydra

  2G

  Creature — Elemental HydraG

  Counter synergy: both cards work with the same kind of counters, so their effects stack in a counters deck. Not necessarily a closed loop on its own.
• Primordial Hydra

  XGG

  Creature — HydraG

  Counter synergy: both cards work with the same kind of counters, so their effects stack in a counters deck. Not necessarily a closed loop on its own.
• Voracious Hydra

  XGG

  Creature — HydraG

  Counter synergy: both cards work with the same kind of counters, so their effects stack in a counters deck. Not necessarily a closed loop on its own.
• Zimone, Paradox Sculptor

  2GU

  Legendary Creature — Human WizardGU

  Counter synergy: both cards work with the same kind of counters, so their effects stack in a counters deck. Not necessarily a closed loop on its own.
• Toothy, Imaginary Friend

  3U

  Legendary Creature — IllusionU

  Draw pair: both cards engage with card draw. With a damage-or-draw trigger between them they form a draw engine.
• Kang, Temporal Tyrant

  2UB

  Legendary Creature — Human VillainBU

  Draw pair: both cards engage with card draw. With a damage-or-draw trigger between them they form a draw engine.
• Moss-Pit Skeleton

  BG

  Creature — Plant SkeletonBG

  Counter synergy: both cards work with the same kind of counters, so their effects stack in a counters deck. Not necessarily a closed loop on its own.
• Baxter, Fly in the Ointment

  3U

  Legendary Creature — Insect Mutant ScientistU

  Draw pair: both cards engage with card draw. With a damage-or-draw trigger between them they form a draw engine.
• The Astonishing Ant-Man

  GU

  Legendary Creature — Human Scientist HeroGU

  Draw pair: both cards engage with card draw. With a damage-or-draw trigger between them they form a draw engine.
• Chasm Skulker

  2U

  Creature — Squid HorrorU

  Draw pair: both cards engage with card draw. With a damage-or-draw trigger between them they form a draw engine.
• Fangs of Kalonia

  1G

  SorceryG

  Counter synergy: both cards work with the same kind of counters, so their effects stack in a counters deck. Not necessarily a closed loop on its own.
• Growth Curve

  GU

  SorceryGU

  Counter synergy: both cards work with the same kind of counters, so their effects stack in a counters deck. Not necessarily a closed loop on its own.
• Innkeeper's Talent

  1G

  Enchantment — ClassG

  Counter synergy: both cards work with the same kind of counters, so their effects stack in a counters deck. Not necessarily a closed loop on its own.
• Pensive Professor

  1UU

  Creature — Human WizardU

  Counter synergy: both cards work with the same kind of counters, so their effects stack in a counters deck. Not necessarily a closed loop on its own.