Confidence:StrongSolidPlausibleTentativeSpeculative

• Sunstrike Legionnaire

  1W

  Creature — Human SoldierW

  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.
• 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.
• Midnight Guard

  2W

  Creature — Human SoldierW

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

  4U

  InstantU

  Intellectual Offering untaps all (or many) permanents, refreshing Gallows at Willow Hill's tap activation.
• Unstoppable Plan

  2U

  EnchantmentU

  Unstoppable Plan untaps all (or many) permanents, refreshing Gallows at Willow Hill's tap activation.
• Seedborn Muse

  3GG

  Creature — SpiritG

  Seedborn Muse untaps all (or many) permanents, refreshing Gallows at Willow Hill's tap activation.
• Unwinding Clock

  4

  ArtifactC

  Unwinding Clock untaps all (or many) permanents, refreshing Gallows at Willow Hill's tap activation.
• Paradox Engine

  5

  Legendary ArtifactC

  Paradox Engine untaps all (or many) permanents, refreshing Gallows at Willow Hill's tap activation.
• Dramatic Reversal

  1U

  InstantU

  Dramatic Reversal untaps all (or many) permanents, refreshing Gallows at Willow Hill's tap activation.
• Blinkmoth Infusion

  12UU

  InstantU

  Blinkmoth Infusion untaps all (or many) permanents, refreshing Gallows at Willow Hill's tap activation.
• Rings of Brighthearth

  3

  ArtifactC

  Gallows at Willow Hill has activated abilities that aren't mana abilities, fueling Rings of Brighthearth's activation-trigger.
• Kurkesh, Onakke Ancient

  2RR

  Legendary Creature — Ogre SpiritR

  Gallows at Willow Hill has activated abilities that aren't mana abilities, fueling Kurkesh, Onakke Ancient's activation-trigger.