Confidence:StrongSolidPlausibleTentativeSpeculative

• Llanowar Loamspeaker

  1G

  Creature — Elf DruidG

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

  1U

  Creature — Human WizardU

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

  2G

  Creature — Elf DruidG

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

  4B

  Creature — Treefolk ShamanB

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

  2G

  Creature — Elf Shaman AllyG

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

  2G

  Creature — Elf WizardG

  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.
• Arna Kennerüd, Skycaptain

  2WUB

  Legendary Creature — Human KnightBUW

  Both cards trigger when a permanent attacks — they fire together.
• Arboreal Alliance

  XGG

  EnchantmentG

  Both cards trigger when a permanent attacks — they fire together.
• Silumgar, the Drifting Death

  4UB

  Legendary Creature — DragonBU

  Both cards trigger when a permanent attacks — they fire together.
• Norn's Choirmaster

  3WW

  Creature — Phyrexian AngelW

  Both cards trigger when a permanent attacks — they fire together.
• Echoing Assault

  4R

  EnchantmentR

  Both cards trigger when a permanent attacks — they fire together.
• Mirror Mockery

  1U

  Enchantment — AuraU

  Both cards trigger when a permanent attacks — they fire together.
• Nascent Metamorph

  1U

  Creature — ShapeshifterU

  Both cards trigger when a permanent attacks — they fire together.
• Narset, Enlightened Exile

  1URW

  Legendary Creature — Human MonkRUW

  Both cards trigger when a permanent attacks — they fire together.
• Zur the Enchanter

  1WUB

  Legendary Creature — Human WizardBUW

  Both cards trigger when a permanent attacks — they fire together.
• Agrus Kos, Spirit of Justice

  2RW

  Legendary Creature — Spirit DetectiveRW

  Both cards trigger when a permanent attacks — they fire together.
• Bilbo, Thief in the Night

  1U

  Legendary Creature — Halfling RogueU

  Both cards trigger when a permanent attacks — they fire together.
• Demonic Covenant

  4BB

  Kindred Enchantment — DemonB

  Both cards trigger when a permanent attacks — they fire together.
• Ambling Stormshell

  3UU

  Creature — TurtleU

  Both cards trigger when a permanent attacks — they fire together.
• Phlage, Titan of Fire's Fury

  1RW

  Legendary Creature — Elder GiantRW

  Both cards trigger when a permanent attacks — they fire together.
• Obsessive Pursuit

  1B

  EnchantmentB

  Both cards trigger when a permanent attacks — they fire together.
• Dreadhorde Arcanist

  1R

  Creature — Zombie WizardR

  Both cards trigger when a permanent attacks — they fire together.
• Banon, the Returners' Leader

  RW

  Legendary Creature — Human Cleric RebelRW

  Both cards trigger when a permanent attacks — they fire together.
• Garruk, Apex Predator

  5BG

  Legendary Planeswalker — GarrukBG

  Both cards trigger when a permanent attacks — they fire together.
• Bruse Tarl, Roving Rancher

  2RW

  Legendary Creature — Human WarriorRW

  Both cards trigger when a permanent attacks — they fire together.