Confidence:StrongSolidPlausibleTentativeSpeculative

• Court of Garenbrig

  1GG

  EnchantmentG

  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.
• Elspeth, Storm Slayer

  3WW

  Legendary Planeswalker — ElspethW

  One card multiplies the tokens the other creates — a token doubler pointed at a steady token source.
• Hollowmurk Siege

  BG

  EnchantmentBG

  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.
• Sazh Katzroy

  3G

  Legendary Creature — Human PilotG

  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.
• Heliod, Sun-Crowned

  2W

  Legendary Enchantment Creature — GodW

  Counter + damage loop: one card spends counters to deal damage while the other replaces them on a hit (Heliod + Walking Ballista class).
• 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.
• Bristly Bill, Spine Sower

  1G

  Legendary Creature — Plant 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.
• 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.
• The Destined White Mage

  2W

  Legendary Creature — Human ClericW

  Counter + damage loop: one card spends counters to deal damage while the other replaces them on a hit (Heliod + Walking Ballista class).
• Ornery Tumblewagg

  2G

  Creature — Brushwagg MountG

  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.
• Vigor

  3GGG

  Creature — Elemental IncarnationG

  Counter + damage loop: one card spends counters to deal damage while the other replaces them on a hit (Heliod + Walking Ballista class).
• Hydra's Growth

  2G

  Enchantment — AuraG

  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.
• Byrke, Long Ear of the Law

  4GW

  Legendary Creature — Rabbit SoldierGW

  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.
• Turtle Van

  3

  Artifact — VehicleC

  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.
• Level Up

  1G

  Enchantment — AuraG

  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.
• The First Tyrannic War

  2GUR

  Enchantment — SagaGRU

  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.
• Sword of Hours

  2

  Artifact — EquipmentC

  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.
• Seismic Tutelage

  3G

  Enchantment — AuraG

  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.
• Arcade Cabinet

  3

  ArtifactC

  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.
• Bretagard Stronghold

  LandGW

  Counter + damage loop: one card spends counters to deal damage while the other replaces them on a hit (Heliod + Walking Ballista class).
• Chevill, Bane of Monsters

  BG

  Legendary Creature — Human RogueBG

  Ulasht, the Hate Seed produces damage that can kill creatures, enabling Chevill, Bane of Monsters's death-trigger or removal payoff.
• Banon, the Returners' Leader

  RW

  Legendary Creature — Human Cleric RebelRW

  Graveyard pair: one card brings creatures back from the graveyard repeatedly (or a creature that returns itself), and the other keeps feeding the loop — a recurring reanimator with a payoff, or a sacrifice outlet with a self-recurring creature.
• The Meathook Massacre

  XBB

  Legendary EnchantmentB

  Ulasht, the Hate Seed produces damage that can kill creatures, enabling The Meathook Massacre's death-trigger or removal payoff.
• Quest for the Gravelord

  B

  EnchantmentB

  Ulasht, the Hate Seed produces damage that can kill creatures, enabling Quest for the Gravelord's death-trigger or removal payoff.

• Completes Slimefoot and Squee × Great Whale

  Refuel loop: one card's payoff untaps your lands, paying for the other's activation again — repeatable every turn, and often infinite. The pair can't keep the loop going alone — this card supplies the missing piece.

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• Completes Slimefoot and Squee × Llanowar Druid

  Refuel loop: one card's payoff untaps your lands, paying for the other's activation again — repeatable every turn, and often infinite. The pair can't keep the loop going alone — this card supplies the missing piece.

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• Completes Palinchron × Slimefoot and Squee

  Refuel loop: one card's payoff untaps your lands, paying for the other's activation again — repeatable every turn, and often infinite. The pair can't keep the loop going alone — this card supplies the missing piece.

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• Completes Peregrine Drake × Slimefoot and Squee

  Refuel loop: one card's payoff untaps your lands, paying for the other's activation again — repeatable every turn, and often infinite. The pair can't keep the loop going alone — this card supplies the missing piece.

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