Confidence:StrongSolidPlausibleTentativeSpeculative

• 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.
• Nuka-Nuke Launcher

  2

  Artifact — EquipmentC

  Both cards trigger when you cast a spell — they fire together.
• Memory Erosion

  1UU

  EnchantmentU

  Both cards trigger when you cast a spell — they fire together.
• Esper Sentinel

  W

  Artifact Creature — Human SoldierW

  Both cards trigger when you cast a spell — they fire together.
• Voice of Resurgence

  GW

  Creature — ElementalGW

  Both cards trigger when you cast a spell — they fire together.
• Prosper, Tome-Bound

  2BR

  Legendary Creature — Tiefling WarlockBR

  Both cards trigger when you cast a spell — they fire together.
• Voltaic Visionary // Volt-Charged Berserker

  1R

  Creature — Human Wizard // Creature — Human BerserkerR

  Both cards trigger when you cast a spell — they fire together.
• Speedball, New Warrior

  2U/R

  Legendary Creature — Human HeroRU

  Both cards trigger when you cast a spell — they fire together.
• Talion, the Kindly Lord

  2UB

  Legendary Creature — Faerie NobleBU

  Both cards trigger when you cast a spell — they fire together.
• Chalice of the Void

  XX

  ArtifactC

  Both cards trigger when you cast a spell — they fire together.
• Mai, Scornful Striker

  1B

  Legendary Creature — Human Noble AllyB

  Both cards trigger when you cast a spell — they fire together.
• Hermit of the Natterknolls // Lone Wolf of the Natterknolls

  2G

  Creature — Human Werewolf // Creature — WerewolfG

  Both cards trigger when you cast a spell — they fire together.
• Ghostly Pilferer

  1U

  Creature — Spirit RogueU

  Both cards trigger when you cast a spell — they fire together.
• Scalding Viper // Steam Clean

  1R1U

  Creature — Elemental Snake // Sorcery — AdventureRU

  Both cards trigger when you cast a spell — they fire together.
• Ruric Thar, the Unbowed

  4RG

  Legendary Creature — Ogre WarriorGR

  Both cards trigger when you cast a spell — they fire together.
• Lavinia, Azorius Renegade

  WU

  Legendary Creature — Human SoldierUW

  Both cards trigger when you cast a spell — they fire together.
• Aerial Extortionist

  3WW

  Creature — Bird SoldierW

  Both cards trigger when you cast a spell — they fire together.
• Painful Quandary

  3BB

  EnchantmentB

  Both cards trigger when you cast a spell — they fire together.
• Erayo, Soratami Ascendant // Erayo's Essence

  1U

  Legendary Creature — Moonfolk Monk // Legendary EnchantmentU

  Both cards trigger when you cast a spell — they fire together.
• Eidolon of the Great Revel

  RR

  Enchantment Creature — SpiritR

  Both cards trigger when you cast a spell — they fire together.
• Arasta of the Endless Web

  2GG

  Legendary Enchantment Creature — SpiderG

  Both cards trigger when you cast a spell — they fire together.
• Kambal, Consul of Allocation

  1WB

  Legendary Creature — Human AdvisorBW

  Both cards trigger when you cast a spell — they fire together.
• Perplexing Chimera

  4U

  Enchantment Creature — ChimeraU

  Both cards trigger when you cast a spell — they fire together.
• Sauron, the Dark Lord

  3UBR

  Legendary Creature — Avatar HorrorBRU

  Both cards trigger when you cast a spell — they fire together.
• Norin the Wary

  R

  Legendary Creature — Human WarriorR

  Both cards trigger when you cast a spell — they fire together.