Confidence:StrongSolidPlausibleTentativeSpeculative

• Elrond, Moon-Reader

  2U

  Legendary Creature — Elf NobleU

  One-directional refresh: one card can untap permanents the other wants to reuse. Not self-sustaining on its own — the untapper has to keep showing up.
• The Mind Stone

  1W

  Legendary Artifact — Infinity StoneW

  One-directional refresh: one card can untap permanents the other wants to reuse. Not self-sustaining on its own — the untapper has to keep showing up.
• Baboon Spirit

  2U

  Creature — Monkey SpiritU

  One-directional refresh: one card can untap permanents the other wants to reuse. Not self-sustaining on its own — the untapper has to keep showing up.
• Distinguished Conjurer

  1W

  Creature — Human WizardW

  One-directional refresh: one card can untap permanents the other wants to reuse. Not self-sustaining on its own — the untapper has to keep showing up.
• The Fire Crystal

  2RR

  Legendary ArtifactR

  One-directional refresh: one card can untap permanents the other wants to reuse. Not self-sustaining on its own — the untapper has to keep showing up.
• Port Razer

  3RR

  Creature — Orc PirateR

  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.
• Orthion, Hero of Lavabrink

  3R

  Legendary Creature — Human SoldierR

  One-directional refresh: one card can untap permanents the other wants to reuse. Not self-sustaining on its own — the untapper has to keep showing up.
• 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.
• Chandra, Flameshaper

  5RR

  Legendary Planeswalker — ChandraR

  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.
• Wrenn and Realmbreaker

  1GG

  Legendary Planeswalker — WrennG

  Bumi, Unleashed untaps all (or many) permanents, refreshing Wrenn and Realmbreaker's tap activation.
• Dragonsoul Prodigy

  2R

  Creature — Human MonkR

  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.
• Xho Cai, Flickering Talon

  URW

  Legendary Creature — Bird MonkRUW

  Blink pair: one card can blink creatures repeatedly, and the other's ETB rewards every re-entry. Free-running only when the blink is free or refunded (Deadeye + Drake class); otherwise a repeatable value engine.
• Lithoform Blight

  1B

  Enchantment — AuraB

  Bumi, Unleashed untaps all (or many) permanents, refreshing Lithoform Blight's tap activation.
• The Soul Stone

  1B

  Legendary Artifact — Infinity StoneB

  One-directional refresh: one card can untap permanents the other wants to reuse. Not self-sustaining on its own — the untapper has to keep showing up.
• All-Out Assault

  2RWB

  EnchantmentBRW

  Both cards produce extra combat steps — their effects stack.
• Alpine Moon

  R

  EnchantmentR

  Bumi, Unleashed untaps all (or many) permanents, refreshing Alpine Moon's tap activation.
• Ojer Taq, Deepest Foundation // Temple of Civilization

  4WW

  Legendary Creature — God // LandW

  Bumi, Unleashed untaps all (or many) permanents, refreshing Ojer Taq, Deepest Foundation's tap activation.
• Emeria's Call // Emeria, Shattered Skyclave

  4WWW

  Sorcery // LandW

  Bumi, Unleashed untaps all (or many) permanents, refreshing Emeria's Call's tap activation.
• Maze's End

  LandC

  Bumi, Unleashed untaps all (or many) permanents, refreshing Maze's End's tap activation.
• Great Divide Guide

  1G

  Creature — Human Scout AllyG

  Bumi, Unleashed untaps all (or many) permanents, refreshing Great Divide Guide's tap activation.
• Soulherder

  1WU

  Creature — SpiritUW

  Blink pair: one card can blink creatures repeatedly, and the other's ETB rewards every re-entry. Free-running only when the blink is free or refunded (Deadeye + Drake class); otherwise a repeatable value engine.
• Saheeli Rai

  1UR

  Legendary Planeswalker — SaheeliRU

  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.
• Restless Fortress

  LandBW

  Bumi, Unleashed untaps all (or many) permanents, refreshing Restless Fortress's tap activation.
• Boseiju, Who Endures

  Legendary LandG

  Bumi, Unleashed untaps all (or many) permanents, refreshing Boseiju, Who Endures's tap activation.