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.
• Najeela, the Blade-Blossom

  2R

  Legendary Creature — Human WarriorBGRUW

  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.
• 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.
• Cacophodon

  3G

  Creature — DinosaurG

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

  2

  Kindred Artifact — Shaman EquipmentC

  Untap loop: each side can untap what the other taps — a genuine mutual refresh engine.
• Chevill, Bane of Monsters

  BG

  Legendary Creature — Human RogueBG

  Rin and Seri, Inseparable produces damage that can kill creatures, enabling Chevill, Bane of Monsters's death-trigger or removal payoff.
• Minsc & Boo, Timeless Heroes

  2RG

  Legendary Planeswalker — MinscGR

  Rin and Seri, Inseparable produces damage that can kill creatures, enabling Minsc & Boo, Timeless Heroes's death-trigger or removal payoff.
• Banon, the Returners' Leader

  RW

  Legendary Creature — Human Cleric RebelRW

  Graveyard pair: one card brings creatures back from the graveyard repeatedly (or a creature that returns itself), and the other keeps feeding the loop — a recurring reanimator with a payoff, or a sacrifice outlet with a self-recurring creature.
• Basri, Tomorrow's Champion

  W

  Legendary Creature — Human KnightW

  Both cards produce the same kind of effect (shared token subtype).
• Kemba, Kha Regent

  1WW

  Legendary Creature — Cat ClericW

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

  XBB

  Legendary EnchantmentB

  Rin and Seri, Inseparable produces damage that can kill creatures, enabling The Meathook Massacre's death-trigger or removal payoff.
• Ajani, Nacatl Pariah // Ajani, Nacatl Avenger

  1W

  Legendary Creature — Cat Warrior // Legendary Planeswalker — AjaniRW

  Both cards produce the same kind of effect (shared token subtype).
• Quest for the Gravelord

  B

  EnchantmentB

  Rin and Seri, Inseparable produces damage that can kill creatures, enabling Quest for the Gravelord's death-trigger or removal payoff.
• Gravecrawler

  B

  Creature — ZombieB

  Graveyard pair: one card brings creatures back from the graveyard repeatedly (or a creature that returns itself), and the other keeps feeding the loop — a recurring reanimator with a payoff, or a sacrifice outlet with a self-recurring creature.
• Bequeathal

  G

  Enchantment — AuraG

  Rin and Seri, Inseparable produces damage that can kill creatures, enabling Bequeathal's death-trigger or removal payoff.
• Kraven the Hunter

  1BG

  Legendary Creature — Human Warrior VillainBG

  Rin and Seri, Inseparable produces damage that can kill creatures, enabling Kraven the Hunter's death-trigger or removal payoff.
• Undead Sprinter

  BR

  Creature — ZombieBR

  Graveyard pair: one card brings creatures back from the graveyard repeatedly (or a creature that returns itself), and the other keeps feeding the loop — a recurring reanimator with a payoff, or a sacrifice outlet with a self-recurring creature.
• Wasitora, Nekoru Queen

  2BRG

  Legendary Creature — Cat DragonBGR

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

  1BB

  Legendary Creature — Human SamuraiB

  Rin and Seri, Inseparable produces damage that can kill creatures, enabling Toshiro Umezawa's death-trigger or removal payoff.
• Copperhorn Scout

  G

  Creature — Elf ScoutG

  Copperhorn Scout untaps all (or many) permanents, refreshing Rin and Seri, Inseparable's tap activation.
• Ajani, Strength of the Pride

  2WW

  Legendary Planeswalker — AjaniW

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

  BB

  Creature — Drix WarlockB

  Graveyard pair: one card brings creatures back from the graveyard repeatedly (or a creature that returns itself), and the other keeps feeding the loop — a recurring reanimator with a payoff, or a sacrifice outlet with a self-recurring creature.
• Enduring Renewal

  2WW

  EnchantmentW

  Rin and Seri, Inseparable produces damage that can kill creatures, enabling Enduring Renewal's death-trigger or removal payoff.