Confidence:StrongSolidPlausibleTentativeSpeculative

• Raggadragga, Goreguts Boss

  2RG

  Legendary Creature — Human BoarGR

  Untap loop: each side can untap what the other taps — a genuine mutual refresh engine.
• Najeela, the Blade-Blossom

  2R

  Legendary Creature — Human WarriorBGRUW

  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.
• Mirran Spy

  2U

  Creature — DroneU

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

  WUB

  Artifact Creature — Vedalken WizardBUW

  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.
• Trickster Mage

  U

  Creature — Human SpellshaperU

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

  3G

  Creature — DinosaurG

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

  5

  Legendary ArtifactC

  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.
• Tenacity

  3W

  InstantW

  Untap loop: each side can untap what the other taps — a genuine mutual refresh engine.
• Prepare // Fight

  1W3G

  Instant // SorceryGW

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

  2

  ArtifactC

  Untap loop: each side can untap what the other taps — a genuine mutual refresh engine.
• Lapis Lazuli Talisman

  2

  ArtifactC

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

  2

  ArtifactC

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

  2

  ArtifactC

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

  2

  ArtifactC

  Untap loop: each side can untap what the other taps — a genuine mutual refresh engine.
• Mind Over Matter

  2UUUU

  EnchantmentU

  Untap loop: each side can untap what the other taps — a genuine mutual refresh engine.
• Chevill, Bane of Monsters

  BG

  Legendary Creature — Human RogueBG

  Razor Boomerang produces damage that can kill creatures, enabling Chevill, Bane of Monsters's death-trigger or removal payoff.
• Minsc & Boo, Timeless Heroes

  2RG

  Legendary Planeswalker — MinscGR

  Razor Boomerang produces damage that can kill creatures, enabling Minsc & Boo, Timeless Heroes's death-trigger or removal payoff.
• Banon, the Returners' Leader

  RW

  Legendary Creature — Human Cleric RebelRW

  Graveyard pair: one card brings creatures back from the graveyard repeatedly (or a creature that returns itself), and the other keeps feeding the loop — a recurring reanimator with a payoff, or a sacrifice outlet with a self-recurring creature.
• The Meathook Massacre

  XBB

  Legendary EnchantmentB

  Razor Boomerang produces damage that can kill creatures, enabling The Meathook Massacre's death-trigger or removal payoff.
• Mari, the Killing Quill

  1BB

  Legendary Creature — Vampire AssassinB

  Razor Boomerang produces damage that can kill creatures, enabling Mari, the Killing Quill's death-trigger or removal payoff.
• Quest for the Gravelord

  B

  EnchantmentB

  Razor Boomerang produces damage that can kill creatures, enabling Quest for the Gravelord's death-trigger or removal payoff.
• Gravecrawler

  B

  Creature — ZombieB

  Graveyard pair: one card brings creatures back from the graveyard repeatedly (or a creature that returns itself), and the other keeps feeding the loop — a recurring reanimator with a payoff, or a sacrifice outlet with a self-recurring creature.
• Bequeathal

  G

  Enchantment — AuraG

  Razor Boomerang produces damage that can kill creatures, enabling Bequeathal's death-trigger or removal payoff.
• Kraven the Hunter

  1BG

  Legendary Creature — Human Warrior VillainBG

  Razor Boomerang produces damage that can kill creatures, enabling Kraven the Hunter's death-trigger or removal payoff.
• Undead Sprinter

  BR

  Creature — ZombieBR

  Graveyard pair: one card brings creatures back from the graveyard repeatedly (or a creature that returns itself), and the other keeps feeding the loop — a recurring reanimator with a payoff, or a sacrifice outlet with a self-recurring creature.