Confidence:StrongSolidPlausibleTentativeSpeculative

• Ambling Stormshell

  3UU

  Creature — TurtleU

  Untap loop: each side can untap what the other taps — a genuine mutual refresh engine.
• Grimgrin, Corpse-Born

  3UB

  Legendary Creature — Zombie WarriorBU

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

  1W

  Creature — Human SoldierW

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

  2RG

  Legendary Creature — Human BoarGR

  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.
• Intruder Alarm

  2U

  EnchantmentU

  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.
• Elmar, Ulvenwald Informant

  1RG

  Legendary Creature — HumanGR

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

  U/R

  Creature — WeirdRU

  Untap loop: each side can untap what the other taps — a genuine mutual refresh engine.
• Rona, Herald of Invasion // Rona, Tolarian Obliterator

  1U

  Legendary Creature — Human Wizard // Legendary Creature — Phyrexian WizardBU

  Untap loop: each side can untap what the other taps — a genuine mutual refresh engine.
• Westvale Abbey // Ormendahl, Profane Prince

  Land // Legendary Creature — DemonB

  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.
• Thermo-Alchemist

  1R

  Creature — Human ShamanR

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

  3

  ArtifactB

  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.
• Merrow Reejerey

  2U

  Creature — Merfolk SoldierU

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

  8CC

  Creature — EldraziC

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

  2U

  Creature — DroneU

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

  1UR

  Creature — WeirdRU

  Untap loop: each side can untap what the other taps — a genuine mutual refresh engine.
• Lightning-Rig Crew

  2R

  Creature — Goblin PirateR

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

  2R

  Artifact Creature — ConstructR

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

  3UR

  Legendary Creature — Avatar WizardRU

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

  4WW

  Creature — AngelW

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

  3U

  Creature — Faerie WizardU

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

  U

  Creature — Human SpellshaperU

  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.
• Midnight Guard

  2W

  Creature — Human SoldierW

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

  2W

  Legendary Creature — Human WarriorRW

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

  3W

  Creature — Cat WizardW

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

• WithGrimgrin, Corpse-Born3UBBU

  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:

  Lord of the Nazgûl3UBSedgemoor Witch2BTalrand, Sky Summoner2UUEmperor Mihail II1UUNurgle's RotBAvacyn's Collar1
  Show cards
• WithBlack Carriage3BBB

  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:

  Lord of the Nazgûl3UBSedgemoor Witch2BTalrand, Sky Summoner2UUEmperor Mihail II1UUNurgle's RotBAvacyn's Collar1
  Show cards
• WithChained Brute1RR

  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:

  Colorstorm Stallion1URRite of the Dragoncaller4RRZaffai, Thunder Conductor2URTalrand, Sky Summoner2UUAvacyn's Collar1Fishing Pole1
  Show cards
• WithMarjhan5UUU

  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:

  Talrand, Sky Summoner2UUEmperor Mihail II1UUOketra's Monument3Urtet, Remnant of Memnarch3Avacyn's Collar1Fishing Pole1
  Show cards