Confidence:StrongSolidPlausibleTentativeSpeculative

• 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.
• Sky Hussar

  3WU

  Creature — Human KnightUW

  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.
• Aura of Dominion

  UU

  Enchantment — AuraU

  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.
• Colorstorm Stallion

  1UR

  Creature — Elemental HorseRU

  Both cards produce the same kind of effect (shared token subtype).
• Omnath, Locus of Rage

  3RRGG

  Legendary Creature — ElementalGR

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

  G

  Creature — Elf ScoutG

  Copperhorn Scout untaps all (or many) permanents, refreshing Invasion of Mercadia's tap activation.
• White Plume Adventurer

  2W

  Creature — Orc ClericW

  White Plume Adventurer untaps all (or many) permanents, refreshing Invasion of Mercadia's tap activation.
• Chandra, Acolyte of Flame

  1RR

  Legendary Planeswalker — ChandraR

  Both cards produce the same kind of effect (shared token subtype).
• Valduk, Keeper of the Flame

  2R

  Legendary Creature — Human ShamanR

  Both cards produce the same kind of effect (shared token subtype).
• Jace, Ingenious Mind-Mage

  4UU

  Legendary Planeswalker — JaceU

  Jace, Ingenious Mind-Mage untaps all (or many) permanents, refreshing Invasion of Mercadia's tap activation.
• Lagomos, Hand of Hatred

  1BR

  Legendary Creature — Human ShamanBR

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

  2R

  EnchantmentR

  Aggravated Assault untaps all (or many) permanents, refreshing Invasion of Mercadia's tap activation.
• Titania, Nature's Force

  4GG

  Legendary Creature — ElementalG

  Both cards produce the same kind of effect (shared token subtype).
• Chandra, Flamecaller

  4RR

  Legendary Planeswalker — ChandraR

  Both cards produce the same kind of effect (shared token subtype).
• The Thirteenth Doctor

  1GU

  Legendary Creature — Time Lord DoctorGU

  The Thirteenth Doctor untaps all (or many) permanents, refreshing Invasion of Mercadia's tap activation.
• Veteran Beastrider

  1GW

  Creature — Human KnightGW

  Veteran Beastrider untaps all (or many) permanents, refreshing Invasion of Mercadia's tap activation.
• The Mind Stone

  1W

  Legendary Artifact — Infinity StoneW

  Blink pair: one card can blink creatures repeatedly, and the other's ETB rewards every re-entry. Free-running only when the blink is free or refunded (Deadeye + Drake class); otherwise a repeatable value engine.
• Drumbellower

  2W

  Creature — SpiritW

  Drumbellower untaps all (or many) permanents, refreshing Invasion of Mercadia's tap activation.
• Gideon, Martial Paragon

  4W

  Legendary Planeswalker — GideonW

  Gideon, Martial Paragon untaps all (or many) permanents, refreshing Invasion of Mercadia's tap activation.
• Dazzling Theater // Prop Room

  3W2W

  Enchantment — Room // Enchantment — RoomW

  Dazzling Theater untaps all (or many) permanents, refreshing Invasion of Mercadia's tap activation.
• Intellectual Offering

  4U

  InstantU

  Intellectual Offering untaps all (or many) permanents, refreshing Invasion of Mercadia's tap activation.
• Prophet of Kruphix

  3GU

  Creature — Human WizardGU

  Prophet of Kruphix untaps all (or many) permanents, refreshing Invasion of Mercadia's tap activation.
• Éomer, Marshal of Rohan

  2RR

  Legendary Creature — Human KnightR

  Éomer, Marshal of Rohan untaps all (or many) permanents, refreshing Invasion of Mercadia's tap activation.
• Ivorytusk Fortress

  2WBG

  Creature — ElephantBGW

  Ivorytusk Fortress untaps all (or many) permanents, refreshing Invasion of Mercadia's tap activation.
• Unstoppable Plan

  2U

  EnchantmentU

  Unstoppable Plan untaps all (or many) permanents, refreshing Invasion of Mercadia's tap activation.