Confidence:StrongSolidPlausibleTentativeSpeculative

• Archivist of Gondor

  2U

  Creature — Human AdvisorU

  Both cards trigger on damage dealt — they fire together.
• Sygg, Wanderwine Wisdom // Sygg, Wanderbrine Shield

  1U

  Legendary Creature — Merfolk Wizard // Legendary Creature — Merfolk RogueUW

  Both cards trigger on damage dealt — they fire together.
• Reanimate

  B

  SorceryB

  Reanimate puts Thrummingbird onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Helping Hand

  W

  SorceryW

  Helping Hand puts Thrummingbird onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Unearth

  B

  SorceryB

  Unearth puts Thrummingbird onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Grave Researcher // Reanimate

  2BB

  Creature — Troll Warlock // SorceryB

  Grave Researcher puts Thrummingbird onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Mikey & Leo, Chaos & Order

  G/WG/W

  Legendary Creature — Mutant Ninja TurtleGW

  Thrummingbird proliferates, growing the counters Mikey & Leo, Chaos & Order relies on.
• The Beast, Deathless Prince

  2BR

  Legendary Creature — DemonBR

  Both cards trigger on damage dealt — they fire together.
• Vraska the Unseen

  3BG

  Legendary Planeswalker — VraskaBG

  Both cards trigger on damage dealt — they fire together.
• The Rani

  1UBR

  Legendary Creature — Time Lord ScientistBRU

  Both cards trigger on damage dealt — they fire together.
• One with Nature

  G

  Enchantment — AuraG

  Both cards trigger on damage dealt — they fire together.
• Hollowmurk Siege

  BG

  EnchantmentBG

  Thrummingbird proliferates, growing the counters Hollowmurk Siege relies on.
• Gonti, Night Minister

  2BB

  Legendary Creature — Aetherborn RogueB

  Both cards trigger on damage dealt — they fire together.
• Lost Jitte

  1

  Legendary Artifact — EquipmentC

  Both cards trigger on damage dealt — they fire together.
• Felix Five-Boots

  2BGU

  Legendary Creature — Ooze RogueBGU

  Felix Five-Boots makes Thrummingbird's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Puppet Master, String Puller

  2R

  Legendary Creature — Human Artificer VillainR

  Both cards trigger on damage dealt — they fire together.
• Teysa, Envoy of Ghosts

  5WB

  Legendary Creature — Human AdvisorBW

  Both cards trigger on damage dealt — they fire together.
• The Master, Mesmerist

  2UB

  Legendary Creature — Time Lord RogueBU

  Both cards trigger on damage dealt — they fire together.
• Tamiyo, Upriser Crowned

  4RW

  Legendary Creature — Moonfolk WarriorRW

  Both cards trigger on damage dealt — they fire together.
• Death to Our Enemies

  2R

  Enchantment — PlanR

  Thrummingbird proliferates, growing the counters Death to Our Enemies relies on.
• Edric, Spymaster of Trest

  1GU

  Legendary Creature — Elf RogueGU

  Both cards trigger on damage dealt — they fire together.
• Gix, Yawgmoth Praetor

  1BB

  Legendary Creature — Phyrexian PraetorB

  Both cards trigger on damage dealt — they fire together.
• Foot Chopper

  1B

  Artifact — EquipmentB

  Both cards trigger on damage dealt — they fire together.
• Ogre-Head Helm

  1R

  Artifact Creature — Equipment OgreR

  Both cards trigger on damage dealt — they fire together.
• Bruce Banner // The Incredible Hulk

  U2RRGG

  Legendary Creature — Human Scientist Hero // Legendary Creature — Gamma Berserker HeroGRU

  Bruce Banner grants an extra combat phase, enabling Thrummingbird's combat-trigger payoff.