Confidence:StrongSolidPlausibleTentativeSpeculative

• The Mighty Thor, Jane Foster

  1WU

  Legendary Creature — Human God HeroUW

  Blink engine: one card blinks creatures — once a turn, once a combat, or each time you pay — and the other's enter-the-battlefield effect fires again on every blink. Real, repeatable value — never infinite on its own.
• Formidable Speaker

  2G

  Creature — Elf DruidG

  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.
• Don & Leo, Problem Solvers

  3W/UW/U

  Legendary Creature — Mutant Ninja TurtleUW

  Blink engine: one card blinks creatures — once a turn, once a combat, or each time you pay — and the other's enter-the-battlefield effect fires again on every blink. Real, repeatable value — never infinite on its own.
• The Legend of Yangchen // Avatar Yangchen

  3WW

  Enchantment — Saga // Legendary Creature — AvatarW

  Blink engine: one card blinks creatures — once a turn, once a combat, or each time you pay — and the other's enter-the-battlefield effect fires again on every blink. Real, repeatable value — never infinite on its own.
• Unstoppable Plan

  2U

  EnchantmentU

  Unstoppable Plan untaps all (or many) permanents, refreshing Key to the Archive's tap activation.
• Teleportation Circle

  3W

  EnchantmentW

  Blink engine: one card blinks creatures — once a turn, once a combat, or each time you pay — and the other's enter-the-battlefield effect fires again on every blink. Real, repeatable value — never infinite on its own.
• Unwinding Clock

  4

  ArtifactC

  Unwinding Clock untaps all (or many) permanents, refreshing Key to the Archive's tap activation.
• Displacer Kitten

  3U

  Creature — Cat BeastU

  Blink engine: one card blinks creatures — once a turn, once a combat, or each time you pay — and the other's enter-the-battlefield effect fires again on every blink. Real, repeatable value — never infinite on its own.
• Manifold Key

  1

  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.
• Appa, Loyal Sky Bison

  4WW

  Legendary Creature — Bison AllyW

  Blink engine: one card blinks creatures — once a turn, once a combat, or each time you pay — and the other's enter-the-battlefield effect fires again on every blink. Real, repeatable value — never infinite on its own.
• Paradox Engine

  5

  Legendary ArtifactC

  Paradox Engine untaps all (or many) permanents, refreshing Key to the Archive's tap activation.
• Escape Protocol

  1U

  EnchantmentU

  Blink engine: one card blinks creatures — once a turn, once a combat, or each time you pay — and the other's enter-the-battlefield effect fires again on every blink. Real, repeatable value — never infinite on its own.
• Dramatic Reversal

  1U

  InstantU

  Dramatic Reversal untaps all (or many) permanents, refreshing Key to the Archive's tap activation.
• The Eternal Wanderer

  4WW

  Legendary PlaneswalkerW

  The Eternal Wanderer blinks (exiles and returns) a permanent, re-firing Key to the Archive's enter-the-battlefield effect.
• Jolted Awake

  W

  SorceryW

  Jolted Awake returns creatures from the graveyard to the battlefield, re-firing Key to the Archive's enter-the-battlefield effect.
• Phelia, Exuberant Shepherd

  1W

  Legendary Creature — DogW

  Phelia, Exuberant Shepherd blinks (exiles and returns) a permanent, re-firing Key to the Archive's enter-the-battlefield effect.
• Explosive Getaway

  3RW

  SorceryRW

  Explosive Getaway blinks (exiles and returns) a permanent, re-firing Key to the Archive's enter-the-battlefield effect.
• Nahiri's Resolve

  3RW

  EnchantmentRW

  Nahiri's Resolve blinks (exiles and returns) a permanent, re-firing Key to the Archive's enter-the-battlefield effect.
• Ayara, Widow of the Realm // Ayara, Furnace Queen

  1BB

  Legendary Creature — Elf Noble // Legendary Creature — Phyrexian Elf NobleBR

  Ayara, Widow of the Realm returns creatures from the graveyard to the battlefield, re-firing Key to the Archive's enter-the-battlefield effect.
• Soul Partition

  1W

  InstantW

  Soul Partition exiles a permanent and lets its owner cast it again — the recast fires Key to the Archive's cast trigger or its enter-the-battlefield effect.
• Appa, Steadfast Guardian

  2WW

  Legendary Creature — Bison AllyW

  Appa, Steadfast Guardian exiles a permanent and lets its owner cast it again — the recast fires Key to the Archive's cast trigger or its enter-the-battlefield effect.
• Brought Back

  WW

  InstantW

  Brought Back returns creatures from the graveyard to the battlefield, re-firing Key to the Archive's enter-the-battlefield effect.
• Daretti, Rocketeer Engineer

  4R

  Legendary Creature — Goblin ArtificerR

  Daretti, Rocketeer Engineer returns creatures from the graveyard to the battlefield, re-firing Key to the Archive's enter-the-battlefield effect.
• Scrap Welder

  2R

  Creature — Goblin ArtificerR

  Scrap Welder returns creatures from the graveyard to the battlefield, re-firing Key to the Archive's enter-the-battlefield effect.
• Guardian of Ghirapur

  2W

  Creature — AngelW

  Guardian of Ghirapur blinks (exiles and returns) a permanent, re-firing Key to the Archive's enter-the-battlefield effect.