Confidence:StrongSolidPlausibleTentativeSpeculative

• Baron Helmut Zemo

  BBB

  Legendary Creature — Human Noble VillainB

  Copy engine: one card makes a copy of a creature every turn, and the other's enter-the-battlefield effect rewards each copy. Real, repeatable value — the partner can't untap or re-enter the copier, so it never goes infinite.
• Tezzeret, Cruel Captain

  3

  Legendary Planeswalker — TezzeretC

  Both cards trigger when a creature enters the battlefield — they fire together.
• Elvish Archivist

  1G

  Creature — Elf ArtificerG

  Both cards trigger when a creature enters the battlefield — they fire together.
• Sarinth Steelseeker

  1G

  Creature — Human Artificer ScoutG

  Both cards trigger when a creature enters the battlefield — they fire together.
• The Mighty Thor, Jane Foster

  1WU

  Legendary Creature — Human God HeroUW

  Both cards trigger when a creature enters the battlefield — they fire together.
• Tetzin, Gnome Champion // The Golden-Gear Colossus

  URW

  Legendary Artifact Creature — Gnome // Legendary Artifact Creature — GnomeRUW

  Both cards trigger when a creature enters the battlefield — they fire together.
• SOLDIER Military Program

  2W

  EnchantmentW

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

  1R

  EnchantmentR

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

  1

  Artifact — EquipmentC

  One-shot copy enabler: a card enters as a copy of another (Phantasmal Image, Body Double, Phyrexian Metamorph), firing the partner's substantive ETB once. Not a repeating chain — fires once on entry — but valuable when the partner's ETB is combo-grade (graveyard reanimator, mana doubler, etc.).
• Skystrike Officer

  2U

  Creature — Human SoldierU

  Both cards produce the same kind of effect (shared token subtype).
• Golbez, Crystal Collector

  UB

  Legendary Creature — Human WizardBU

  Both cards trigger when a creature enters the battlefield — they fire together.
• Dino DNA

  1

  ArtifactC

  Copy engine: one card makes a copy of a creature every turn, and the other's enter-the-battlefield effect rewards each copy. Real, repeatable value — the partner can't untap or re-enter the copier, so it never goes infinite.
• Kíli the Resourceful

  1W

  Legendary Creature — Dwarf ScoutW

  Both cards trigger when a creature enters the battlefield — they fire together.
• Moon Girl and Devil Dinosaur

  1GU

  Legendary Creature — Human Dinosaur HeroGU

  Both cards trigger when a creature enters the battlefield — they fire together.
• Chrome Dome

  2

  Artifact Creature — Robot NinjaC

  Copy engine: one card makes a copy of a creature every turn, and the other's enter-the-battlefield effect rewards each copy. Real, repeatable value — the partner can't untap or re-enter the copier, so it never goes infinite.
• Chishiro, the Shattered Blade

  2RG

  Legendary Creature — Snake SamuraiGR

  Both cards trigger when a creature enters the battlefield — they fire together.
• Maralen, Fae Ascendant

  2BGU

  Legendary Creature — Elf Faerie NobleBGU

  Both cards trigger when a creature enters the battlefield — they fire together.
• Haru, Hidden Talent

  1G

  Legendary Creature — Human Peasant AllyG

  Both cards trigger when a creature enters the battlefield — they fire together.
• Puresteel Paladin

  WW

  Creature — Human KnightW

  Both cards trigger when a creature enters the battlefield — they fire together.
• Tidus, Blitzball Star

  1WU

  Legendary Creature — Human WarriorUW

  Both cards trigger when a creature enters the battlefield — they fire together.
• Rionya, Fire Dancer

  3RR

  Legendary Creature — Human WizardR

  Copy engine: one card makes a copy of a creature every turn, and the other's enter-the-battlefield effect rewards each copy. Real, repeatable value — the partner can't untap or re-enter the copier, so it never goes infinite.
• Contraband Kingpin

  UB

  Creature — Aetherborn RogueBU

  Both cards trigger when a creature enters the battlefield — they fire together.
• Transplant Theorist

  3U

  Artifact Creature — Phyrexian ArtificerU

  Both cards trigger when a creature enters the battlefield — they fire together.
• The Fourteenth Doctor

  R/GWU

  Legendary Creature — Time Lord DoctorGRUW

  One-shot copy enabler: a card enters as a copy of another (Phantasmal Image, Body Double, Phyrexian Metamorph), firing the partner's substantive ETB once. Not a repeating chain — fires once on entry — but valuable when the partner's ETB is combo-grade (graveyard reanimator, mana doubler, etc.).
• Canoptek Spyder

  5

  Artifact Creature — SpiderC

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