Confidence:StrongSolidPlausibleTentativeSpeculative

• Pia Nalaar, Consul of Revival

  RW

  Legendary Creature — Human ArtificerRW

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

  B

  SorceryB

  Reanimate puts Thopter Assembly 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 Thopter Assembly onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Retrofitter Foundry

  1

  ArtifactC

  Both cards produce the same kind of effect (shared token subtype).
• Saheeli, Jewel of Avishkar

  2UR

  Legendary Creature — Human ArtificerRU

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

  3

  Artifact Creature — ConstructC

  Both cards produce the same kind of effect (shared token subtype).
• Intrude on the Mind

  3UU

  InstantU

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

  5

  Artifact Creature — ThopterC

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

  3R

  Creature — Human ArtificerR

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

  1G

  EnchantmentG

  Thopter Assembly bounces a permanent, enabling Season of Growth's recast / spell-cast trigger.
• Spreading Plague

  4B

  EnchantmentB

  Thopter Assembly bounces a permanent, enabling Spreading Plague's recast / spell-cast trigger.
• Tinybones Joins Up

  B

  Legendary EnchantmentB

  Thopter Assembly bounces a permanent, enabling Tinybones Joins Up's recast / spell-cast trigger.
• Grist, Voracious Larva // Grist, the Plague Swarm

  G

  Legendary Creature — Insect // Legendary Planeswalker — GristBG

  Thopter Assembly bounces a permanent, enabling Grist, Voracious Larva's recast / spell-cast trigger.
• Liliana, Death's Majesty

  3BB

  Legendary Planeswalker — LilianaB

  Liliana, Death's Majesty puts Thopter Assembly onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Momo, Friendly Flier

  W

  Legendary Creature — Lemur Bat AllyW

  Thopter Assembly bounces a permanent, enabling Momo, Friendly Flier's recast / spell-cast trigger.
• Chandra, Spark Hunter

  3R

  Legendary Planeswalker — ChandraR

  Thopter Assembly bounces a permanent, enabling Chandra, Spark Hunter's recast / spell-cast trigger.
• Yore-Tiller Nephilim

  WUBR

  Creature — NephilimBRUW

  Yore-Tiller Nephilim puts Thopter Assembly onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• The Sibsig Ceremony

  BBB

  Legendary EnchantmentB

  Thopter Assembly bounces a permanent, enabling The Sibsig Ceremony's recast / spell-cast trigger.
• Sefris of the Hidden Ways

  WUB

  Legendary Creature — Human WizardBUW

  Sefris of the Hidden Ways puts Thopter Assembly onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Recurring Nightmare

  2B

  EnchantmentB

  Recurring Nightmare puts Thopter Assembly onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Unfinished Business

  3WW

  SorceryW

  Unfinished Business puts Thopter Assembly onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Priest of Fell Rites

  WB

  Creature — Human WarlockBW

  Priest of Fell Rites puts Thopter Assembly onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Tribute to the World Tree

  GGG

  EnchantmentG

  Thopter Assembly bounces a permanent, enabling Tribute to the World Tree's recast / spell-cast trigger.
• The Cruelty of Gix

  3BB

  Enchantment — SagaB

  The Cruelty of Gix puts Thopter Assembly onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Arcades, the Strategist

  1GWU

  Legendary Creature — Elder DragonGUW

  Thopter Assembly bounces a permanent, enabling Arcades, the Strategist's recast / spell-cast trigger.