Confidence:StrongSolidPlausibleTentativeSpeculative

• Verdant Dread

  1G

  EnchantmentG

  Both cards trigger when a creature enters the battlefield — they fire together.
• Junkyard Scrapper

  2R

  Creature — Goblin ArtificerR

  Both cards trigger when a creature enters the battlefield — they fire together.
• Dragonsoul Prodigy

  2R

  Creature — Human MonkR

  Copy engine: one card makes copies of a creature — once a turn, or once for each time you pay its cost — and each copy pays off: the creature's enter-the-battlefield effect fires again, or the hasty copy uses its tap ability. Real, repeatable value — every copy has its turn or its price, so it never goes infinite on its own.
• Drix Interlacer

  1

  ArtifactC

  Both cards trigger when a creature enters the battlefield — they fire together.
• Legion of Clay

  3G

  EnchantmentG

  Both cards trigger when a creature enters the battlefield — they fire together.
• Spirited Simulacrum

  4

  Artifact Creature — RobotC

  Both cards trigger when a creature enters the battlefield — they fire together.
• Sundering Sentinel

  2RRWW

  Artifact Creature — ConstructRW

  Both cards trigger when a creature enters the battlefield — they fire together.
• A-Circuit Mender

  3

  Artifact Creature — InsectC

  Both cards trigger when a creature enters the battlefield — they fire together.
• Caldera Breaker

  3RRR

  Artifact Creature — GolemR

  Both cards trigger when a creature enters the battlefield — they fire together.
• Honor the Past

  2W

  SorceryW

  Honor the Past puts Mechan Assembler onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• A-Ocelot Pride

  1W

  Creature — CatW

  A-Ocelot Pride creates token copies, feeding Mechan Assembler's ETB or copy payoff.
• A-Thran Spider

  3

  Artifact Creature — SpiderC

  Both cards trigger when a creature enters the battlefield — they fire together.
• Darksteel Hydra

  XWBG

  Artifact Creature — Phyrexian HydraBGW

  Both cards trigger when a creature enters the battlefield — they fire together.
• Warzone Duplicator

  6

  Artifact Creature — ConstructU

  Both cards trigger when a creature enters the battlefield — they fire together.
• A-Cloister Gargoyle

  1W

  Artifact Creature — GargoyleW

  Both cards trigger when a creature enters the battlefield — they fire together.
• Spotlight Falcon

  2WW

  Artifact Creature — BirdW

  Both cards trigger when a creature enters the battlefield — they fire together.
• Divine Purge

  1WW

  SorceryW

  Divine Purge exiles a permanent and lets its owner cast it again — the recast fires Mechan Assembler's cast trigger or its enter-the-battlefield effect.
• Patchplate Resolute

  3

  Artifact Creature — SoldierW

  Both cards trigger when a creature enters the battlefield — they fire together.
• A-Nezumi Prowler

  1B

  Artifact Creature — Rat NinjaB

  Both cards trigger when a creature enters the battlefield — they fire together.
• Coalition Construct

  3

  Artifact Creature — ConstructC

  Both cards trigger when a creature enters the battlefield — they fire together.
• Surgical Metamorph

  3U

  Artifact Creature — Phyrexian ShapeshifterU

  Surgical Metamorph is a clone — it can enter as a copy of another creature — so it re-uses Mechan Assembler's enter-the-battlefield effect.