Confidence:StrongSolidPlausibleTentativeSpeculative

• Season of Growth

  1G

  EnchantmentG

  Imposter Mech is a clone — it can enter as a copy of another creature — so it re-uses Season of Growth's enter-the-battlefield effect.
• Spreading Plague

  4B

  EnchantmentB

  Imposter Mech is a clone — it can enter as a copy of another creature — so it re-uses Spreading Plague's enter-the-battlefield effect.
• Tinybones Joins Up

  B

  Legendary EnchantmentB

  Imposter Mech is a clone — it can enter as a copy of another creature — so it re-uses Tinybones Joins Up's enter-the-battlefield effect.
• Faramir, Steward of Gondor

  1WU

  Legendary Creature — Human NobleUW

  Imposter Mech is a clone — it can enter as a copy of another creature — so it re-uses Faramir, Steward of Gondor's enter-the-battlefield effect.
• Eye of Singularity

  3W

  World EnchantmentW

  Imposter Mech is a clone — it can enter as a copy of another creature — so it re-uses Eye of Singularity's enter-the-battlefield effect.
• Garruk, Curse Breaker

  3GG

  Legendary Planeswalker — GarrukG

  Imposter Mech is a clone — it can enter as a copy of another creature — so it re-uses Garruk, Curse Breaker's enter-the-battlefield effect.
• Kadena, Slinking Sorcerer

  1BGU

  Legendary Creature — Snake Wizard SorcererBGU

  Imposter Mech is a clone — it can enter as a copy of another creature — so it re-uses Kadena, Slinking Sorcerer's enter-the-battlefield effect.
• Summon: Knights of Round

  6WW

  Enchantment Creature — Saga KnightW

  Imposter Mech is a clone — it can enter as a copy of another creature — so it re-uses Summon: Knights of Round's enter-the-battlefield effect.
• Grist, Voracious Larva // Grist, the Plague Swarm

  G

  Legendary Creature — Insect // Legendary Planeswalker — GristBG

  Imposter Mech is a clone — it can enter as a copy of another creature — so it re-uses Grist, Voracious Larva's enter-the-battlefield effect.
• Warden of the Grove

  2G

  Creature — HydraG

  Imposter Mech is a clone — it can enter as a copy of another creature — so it re-uses Warden of the Grove's enter-the-battlefield effect.
• Greasefang, Okiba Boss

  1WB

  Legendary Creature — Rat PilotBW

  Greasefang, Okiba Boss returns creatures from the graveyard to the battlefield, re-firing Imposter Mech's enter-the-battlefield effect.
• Momo, Friendly Flier

  W

  Legendary Creature — Lemur Bat AllyW

  Imposter Mech is a clone — it can enter as a copy of another creature — so it re-uses Momo, Friendly Flier's enter-the-battlefield effect.
• Esper Origins // Summon: Esper Maduin

  1G

  Sorcery // Enchantment Creature — Saga ElementalG

  Imposter Mech is a clone — it can enter as a copy of another creature — so it re-uses Esper Origins's enter-the-battlefield effect.
• Fire Lord Zuko

  RWB

  Legendary Creature — Human Noble AllyBRW

  Imposter Mech is a clone — it can enter as a copy of another creature — so it re-uses Fire Lord Zuko's enter-the-battlefield effect.
• The Eternal Wanderer

  4WW

  Legendary PlaneswalkerW

  The Eternal Wanderer blinks (exiles and returns) a permanent, re-firing Imposter Mech's enter-the-battlefield effect.
• Lagrella, the Magpie

  GWU

  Legendary Creature — Human SoldierGUW

  Imposter Mech is a clone — it can enter as a copy of another creature — so it re-uses Lagrella, the Magpie's enter-the-battlefield effect.
• Jolted Awake

  W

  SorceryW

  Jolted Awake returns creatures from the graveyard to the battlefield, re-firing Imposter Mech's enter-the-battlefield effect.
• Prowl, Stoic Strategist // Prowl, Pursuit Vehicle

  3W

  Legendary Artifact Creature — Robot // Legendary Artifact — VehicleW

  Imposter Mech is a clone — it can enter as a copy of another creature — so it re-uses Prowl, Stoic Strategist's enter-the-battlefield effect.
• The Sibsig Ceremony

  BBB

  Legendary EnchantmentB

  Imposter Mech is a clone — it can enter as a copy of another creature — so it re-uses The Sibsig Ceremony's enter-the-battlefield effect.
• Gladewalker Ritualist

  2G

  Creature — ShapeshifterG

  Imposter Mech is a clone — it can enter as a copy of another creature — so it re-uses Gladewalker Ritualist's enter-the-battlefield effect.
• Phelia, Exuberant Shepherd

  1W

  Legendary Creature — DogW

  Phelia, Exuberant Shepherd blinks (exiles and returns) a permanent, re-firing Imposter Mech's enter-the-battlefield effect.
• Gilgamesh, Master-at-Arms

  4RR

  Legendary Creature — Human SamuraiR

  Imposter Mech is a clone — it can enter as a copy of another creature — so it re-uses Gilgamesh, Master-at-Arms's enter-the-battlefield effect.
• Garruk's Uprising

  2G

  EnchantmentG

  Imposter Mech is a clone — it can enter as a copy of another creature — so it re-uses Garruk's Uprising's enter-the-battlefield effect.
• Righteous Valkyrie

  2W

  Creature — Angel ClericW

  Imposter Mech is a clone — it can enter as a copy of another creature — so it re-uses Righteous Valkyrie's enter-the-battlefield effect.
• April O'Neil, Live on the Scene

  1U

  Legendary Creature — Human DetectiveU

  Imposter Mech is a clone — it can enter as a copy of another creature — so it re-uses April O'Neil, Live on the Scene's enter-the-battlefield effect.