Confidence:StrongSolidPlausibleTentativeSpeculative

• Murmuration

  4W

  EnchantmentW

  Both cards produce the same kind of effect (shared token subtype).
• Hermes, Overseer of Elpis

  3U

  Legendary Creature — Elder WizardU

  Both cards produce the same kind of effect (shared token subtype).
• Rendmaw, Creaking Nest

  3BG

  Legendary Artifact Creature — ScarecrowBG

  Both cards produce the same kind of effect (shared token subtype).
• Swords to Plowshares

  W

  InstantW

  Swords to Plowshares gains life in big chunks or many small hits, fueling Gwaihir, Greatest of the Eagles's life-gain payoff.
• Emeritus of Truce // Swords to Plowshares

  1WWW

  Creature — Cat Cleric // InstantW

  Emeritus of Truce gains life in big chunks or many small hits, fueling Gwaihir, Greatest of the Eagles's life-gain payoff.
• Elemental Spectacle

  5G

  SorceryG

  Elemental Spectacle gains life in big chunks or many small hits, fueling Gwaihir, Greatest of the Eagles's life-gain payoff.
• Eriette of the Charmed Apple

  1WB

  Legendary Creature — Human WarlockBW

  Eriette of the Charmed Apple gains life in big chunks or many small hits, fueling Gwaihir, Greatest of the Eagles's life-gain payoff.
• Kaya's Wrath

  WWBB

  SorceryBW

  Kaya's Wrath gains life in big chunks or many small hits, fueling Gwaihir, Greatest of the Eagles's life-gain payoff.
• Obsessive Pursuit

  1B

  EnchantmentB

  Both cards trigger when a permanent attacks — they fire together.
• Solitude

  3WW

  Creature — Elemental IncarnationW

  Solitude gains life in big chunks or many small hits, fueling Gwaihir, Greatest of the Eagles's life-gain payoff.
• Riku of Many Paths

  GUR

  Legendary Creature — Human WizardGRU

  Both cards produce the same kind of effect (shared token subtype).
• Omnath, Locus of Creation

  RGWU

  Legendary Creature — ElementalGRUW

  Omnath, Locus of Creation gains life in big chunks or many small hits, fueling Gwaihir, Greatest of the Eagles's life-gain payoff.
• Perch Protection

  4WW

  InstantW

  Both cards produce the same kind of effect (shared token subtype).
• Huatli, Warrior Poet

  3RW

  Legendary Planeswalker — HuatliRW

  Huatli, Warrior Poet gains life in big chunks or many small hits, fueling Gwaihir, Greatest of the Eagles's life-gain payoff.
• Mayael's Aria

  RGW

  EnchantmentGRW

  Mayael's Aria gains life in big chunks or many small hits, fueling Gwaihir, Greatest of the Eagles's life-gain payoff.
• Ignoble Hierarch

  G

  Creature — Goblin ShamanBGR

  Both cards trigger when a permanent attacks — they fire together.
• Noble Hierarch

  G

  Creature — Human DruidGUW

  Both cards trigger when a permanent attacks — they fire together.
• Avenge

  4WW

  SorceryW

  Avenge gains life in big chunks or many small hits, fueling Gwaihir, Greatest of the Eagles's life-gain payoff.
• Mu Yanling, Sky Dancer

  1UU

  Legendary Planeswalker — YanlingU

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

  B

  SorceryB

  Reanimate puts Gwaihir, Greatest of the Eagles onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Bard, Heir of Girion

  2WU

  Legendary Creature — Human ArcherUW

  Both cards trigger when a permanent attacks — they fire together.
• Garruk, Curse Breaker

  3GG

  Legendary Planeswalker — GarrukG

  Both cards trigger when a permanent attacks — they fire together.
• Combat Calligrapher

  3W

  Creature — Bird ClericW

  Both cards trigger when a permanent attacks — they fire together.
• Winota, Joiner of Forces

  2RW

  Legendary Creature — Human WarriorRW

  Both cards trigger when a permanent attacks — they fire together.
• Gallia of the Endless Dance

  RG

  Legendary Creature — SatyrGR

  Both cards trigger when a permanent attacks — they fire together.