Confidence:StrongSolidPlausibleTentativeSpeculative

• Captain of the Mists

  2U

  Creature — Human 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.
• Oath of Eorl

  3RW

  Enchantment — SagaRW

  Both cards produce the same kind of effect (shared token subtype).
• General's Enforcer

  WB

  Creature — Human SoldierBW

  Both cards produce the same kind of effect (shared token subtype).
• SOLDIER Military Program

  2W

  EnchantmentW

  Both cards produce the same kind of effect (shared token subtype).
• Osgood, Operation Double

  2UU

  Legendary Creature — Human Alien ShapeshifterU

  Both cards produce the same kind of effect (shared token subtype).
• Lossarnach Captain

  3W

  Creature — Human SoldierW

  Both cards produce the same kind of effect (shared token subtype).
• Skystrike Officer

  2U

  Creature — Human SoldierU

  Both cards produce the same kind of effect (shared token subtype).
• Intellectual Offering

  4U

  InstantU

  Intellectual Offering untaps all (or many) permanents, refreshing Horn of Gondor's tap activation.
• Unstoppable Plan

  2U

  EnchantmentU

  Unstoppable Plan untaps all (or many) permanents, refreshing Horn of Gondor's tap activation.
• Jerren, Corrupted Bishop // Ormendahl, the Corrupter

  2B

  Legendary Creature — Human Cleric // Legendary Creature — DemonB

  Both cards produce the same kind of effect (shared token subtype).
• Fugitive of the Judoon

  4G

  Enchantment — SagaG

  Both cards produce the same kind of effect (shared token subtype).
• Captain of the Watch

  4WW

  Creature — Human SoldierW

  Both cards produce the same kind of effect (shared token subtype).
• Siege Veteran

  2W

  Creature — Human SoldierW

  Both cards produce the same kind of effect (shared token subtype).
• Seedborn Muse

  3GG

  Creature — SpiritG

  Seedborn Muse untaps all (or many) permanents, refreshing Horn of Gondor's tap activation.
• Unwinding Clock

  4

  ArtifactC

  Unwinding Clock untaps all (or many) permanents, refreshing Horn of Gondor's tap activation.
• Council of Reeds

  2U

  Legendary Creature — Human Scientist HeroU

  Both cards produce the same kind of effect (shared token subtype).
• Sigarda, Heron's Grace

  3GW

  Legendary Creature — AngelGW

  Both cards produce the same kind of effect (shared token subtype).
• Jirina Kudro

  1RWB

  Legendary Creature — Human SoldierBRW

  Both cards produce the same kind of effect (shared token subtype).
• Paradox Engine

  5

  Legendary ArtifactC

  Paradox Engine untaps all (or many) permanents, refreshing Horn of Gondor's tap activation.
• Mirror-Sigil Sergeant

  5W

  Creature — Rhino SoldierW

  Both cards produce the same kind of effect (shared token subtype).
• Stangg

  4RG

  Legendary Creature — Human WarriorGR

  Both cards produce the same kind of effect (shared token subtype).
• Knight-Captain of Eos

  4W

  Creature — Human KnightW

  Both cards produce the same kind of effect (shared token subtype).
• Dramatic Reversal

  1U

  InstantU

  Dramatic Reversal untaps all (or many) permanents, refreshing Horn of Gondor's tap activation.
• Thatcher Revolt

  2R

  SorceryR

  Both cards produce the same kind of effect (shared token subtype).
• Blinkmoth Infusion

  12UU

  InstantU

  Blinkmoth Infusion untaps all (or many) permanents, refreshing Horn of Gondor's tap activation.