Confidence:StrongSolidPlausibleTentativeSpeculative

• Arcanis the Omnipotent

  3UUU

  Legendary Creature — WizardU

  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.
• Dour Port-Mage

  1U

  Creature — Frog WizardU

  Untap loop: each side can untap what the other taps — a genuine mutual refresh engine.
• Toralf, God of Fury // Toralf's Hammer

  2RR1R

  Legendary Creature — God // Legendary Artifact — EquipmentR

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

  1U/RU/R

  Creature — ElementalRU

  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.
• Elvish Scout

  G

  Creature — Elf ScoutG

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

  1UU

  Legendary Creature — Human AdvisorU

  Untap loop: each side can untap what the other taps — a genuine mutual refresh engine.
• Niambi, Esteemed Speaker

  WU

  Legendary Creature — Human ClericUW

  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.
• Drafna, Founder of Lat-Nam

  1U

  Legendary Creature — Human Artificer AdvisorU

  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.
• Karakas

  Legendary LandW

  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.
• Chulane, Teller of Tales

  2GWU

  Legendary Creature — Human DruidGUW

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

  1

  Artifact — EquipmentC

  Untap loop: each side can untap what the other taps — a genuine mutual refresh engine.
• Bramble Familiar // Fetch Quest

  1G5GG

  Creature — Elemental Raccoon // Sorcery — AdventureG

  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.
• Samut, Voice of Dissent

  3RG

  Legendary Creature — Human WarriorGRW

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

  2

  Legendary ArtifactC

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

  1BR

  ArtifactBR

  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.
• Bane Alley Broker

  1UB

  Creature — Human RogueBU

  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.
• Forensic Researcher

  2U

  Creature — Merfolk DetectiveU

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

  1G

  Creature — ElfG

  Untap loop: each side can untap what the other taps — a genuine mutual refresh engine.
• Nature's Chosen

  G

  Enchantment — AuraG

  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.
• Coastal Drake

  2U

  Creature — DrakeU

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

  W

  Creature — Dinosaur NinjaW

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

  2UU

  Creature — Human WizardU

  Untap loop: each side can untap what the other taps — a genuine mutual refresh engine.
• Saryth, the Viper's Fang

  2GG

  Legendary Creature — Human WarlockG

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

  2U

  Creature — Merfolk WizardU

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

  1GU

  Legendary Creature — Frog DruidGU

  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.

• WithIngenuity Engine7C

  Untap loop: each card untaps the other, generating arbitrary activations or mana. These two can't keep the loop going alone — add one of these to complete it:

  Forensic Gadgeteer2UTrail of Evidence2UOngoing Investigation1ULavinia, Foil to Conspiracy1W/UW/UNuka-Cola Vending Machine3Malcolm, the EyesUR
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