Confidence:StrongSolidPlausibleTentativeSpeculative

• Ral Zarek

  2UR

  Legendary Planeswalker — RalRU

  Both cards produce extra combat steps — their effects stack.
• Cacophony Scamp

  R

  Creature — Phyrexian Goblin WarriorR

  Damage pair: both cards convert effects into damage. They stack in a damage-heavy deck; on their own they're a value engine, not a closed loop.
• Rem Karolus, Stalwart Slayer

  1RW

  Legendary Creature — Human KnightRW

  Damage pair: both cards convert effects into damage. They stack in a damage-heavy deck; on their own they're a value engine, not a closed loop.
• Niv-Mizzet, Guildpact

  WUBRG

  Legendary Creature — Dragon AvatarBGRUW

  Damage pair: both cards convert effects into damage. They stack in a damage-heavy deck; on their own they're a value engine, not a closed loop.
• Magma Pummeler

  XRR

  Creature — ElementalR

  Damage pair: both cards convert effects into damage. They stack in a damage-heavy deck; on their own they're a value engine, not a closed loop.
• Dreadhorde Butcher

  BR

  Creature — Zombie WarriorBR

  Damage pair: both cards convert effects into damage. They stack in a damage-heavy deck; on their own they're a value engine, not a closed loop.
• Jennifer Walters // The Sensational She-Hulk

  1W3GWW

  Legendary Creature — Human Advisor Hero // Legendary Creature — Gamma HeroGW

  Damage pair: both cards convert effects into damage. They stack in a damage-heavy deck; on their own they're a value engine, not a closed loop.
• Incinerator of the Guilty

  4RR

  Creature — DragonR

  Damage pair: both cards convert effects into damage. They stack in a damage-heavy deck; on their own they're a value engine, not a closed loop.
• Tolarian Kraken

  4UU

  Creature — KrakenU

  Untap loop: each side can untap what the other taps — a genuine mutual refresh engine.
• Samite Archer

  1WU

  Creature — Human Cleric ArcherUW

  Damage pair: both cards convert effects into damage. They stack in a damage-heavy deck; on their own they're a value engine, not a closed loop.
• Shockmaw Dragon

  4RR

  Creature — DragonR

  Damage pair: both cards convert effects into damage. They stack in a damage-heavy deck; on their own they're a value engine, not a closed loop.
• Copperhorn Scout

  G

  Creature — Elf ScoutG

  Copperhorn Scout untaps all (or many) permanents, refreshing Bruce Banner's tap activation.
• Crackleburr

  1U/RU/R

  Creature — ElementalRU

  Untap loop: each side can untap what the other taps — a genuine mutual refresh engine.
• White Plume Adventurer

  2W

  Creature — Orc ClericW

  White Plume Adventurer untaps all (or many) permanents, refreshing Bruce Banner's tap activation.
• Jace, Ingenious Mind-Mage

  4UU

  Legendary Planeswalker — JaceU

  Jace, Ingenious Mind-Mage untaps all (or many) permanents, refreshing Bruce Banner's tap activation.
• 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.
• The Thirteenth Doctor

  1GU

  Legendary Creature — Time Lord DoctorGU

  The Thirteenth Doctor untaps all (or many) permanents, refreshing Bruce Banner's tap activation.
• Veteran Beastrider

  1GW

  Creature — Human KnightGW

  Veteran Beastrider untaps all (or many) permanents, refreshing Bruce Banner's tap activation.
• Intruder Alarm

  2U

  EnchantmentU

  Intruder Alarm untaps all (or many) permanents, refreshing Bruce Banner's tap activation.
• Drumbellower

  2W

  Creature — SpiritW

  Drumbellower untaps all (or many) permanents, refreshing Bruce Banner's tap activation.
• Gideon, Martial Paragon

  4W

  Legendary Planeswalker — GideonW

  Gideon, Martial Paragon untaps all (or many) permanents, refreshing Bruce Banner's tap activation.
• Godo, Bandit Warlord

  5R

  Legendary Creature — Human BarbarianR

  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.