Confidence:StrongSolidPlausibleTentativeSpeculative

• Ral Zarek

  2UR

  Legendary Planeswalker — RalRU

  Both cards produce extra combat steps — their effects stack.
• 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.
• Bruce Banner // The Incredible Hulk

  U2RRGG

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

  Both cards produce extra combat steps — their effects stack.
• All-Out Assault

  2RWB

  EnchantmentBRW

  Both cards produce extra combat steps — their effects stack.
• Aggravated Assault

  2R

  EnchantmentR

  Both cards produce extra combat steps — their effects stack.
• Balthier and Fran

  1RG

  Legendary Creature — Human RabbitGR

  Both cards produce extra combat steps — their effects stack.
• Zariel, Archduke of Avernus

  2RR

  Legendary Planeswalker — ZarielR

  Both cards produce extra combat steps — their effects stack.
• 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.
• Fury of the Horde

  5RR

  SorceryR

  Both cards produce extra combat steps — their effects stack.
• Fear of Missing Out

  1R

  Enchantment Creature — NightmareR

  Both cards produce extra combat steps — their effects stack.
• Waves of Aggression

  3R/WR/W

  SorceryRW

  Both cards produce extra combat steps — their effects stack.
• Éomer, Marshal of Rohan

  2RR

  Legendary Creature — Human KnightR

  Both cards produce extra combat steps — their effects stack.
• Bumi, Unleashed

  3RG

  Legendary Creature — Human Noble AllyGR

  Both cards produce extra combat steps — their effects stack.
• Relentless Assault

  2RR

  SorceryR

  Both cards produce extra combat steps — their effects stack.
• Najeela, the Blade-Blossom

  2R

  Legendary Creature — Human WarriorBGRUW

  Both cards produce extra combat steps — their effects stack.
• Rionya, Fire Dancer✓

  3RR

  Legendary Creature — Human WizardR

  Copy chain: one card creates hasty copies of a creature whose ability or ETB the partner exploits — the canonical Kiki-Jiki / Splinter Twin pattern.
• Combat Celebrant

  2R

  Creature — Human WarriorR

  Both cards produce extra combat steps — their effects stack.
• Aurelia, the Warleader

  2RRWW

  Legendary Creature — AngelRW

  Both cards produce extra combat steps — their effects stack.
• Helm of the Host✓

  4

  Legendary Artifact — EquipmentC

  Copy chain: one card creates hasty copies of a creature whose ability or ETB the partner exploits — the canonical Kiki-Jiki / Splinter Twin pattern.
• World at War

  3RR

  SorceryR

  Both cards produce extra combat steps — their effects stack.
• Response // Resurgence

  R/WR/W3RW

  Instant // SorceryRW

  Both cards produce extra combat steps — their effects stack.
• Raph & Leo, Sibling Rivals

  1R/WR/W

  Legendary Creature — Mutant Ninja TurtleRW

  Both cards produce extra combat steps — their effects stack.
• Offspring's Revenge

  2RWB

  EnchantmentBRW

  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.
• Anzrag, the Quake-Mole

  2RG

  Legendary Creature — Mole GodGR

  Both cards produce extra combat steps — their effects stack.
• Raphael, Tag Team Tough

  4RR

  Legendary Creature — Mutant Ninja TurtleR

  Both cards produce extra combat steps — their effects stack.