Confidence:StrongSolidPlausibleTentativeSpeculative

• Earthcraft

  1G

  EnchantmentG

  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.
• Fiery Gambit

  2R

  SorceryR

  Fiery Gambit untaps all (or many) permanents, refreshing Caribou Range's tap activation.
• Innocuous Researcher

  3G

  Creature — Centaur DetectiveG

  Innocuous Researcher untaps all (or many) permanents, refreshing Caribou Range's tap activation.
• Beledros Witherbloom

  5BG

  Legendary Creature — Elder DragonBG

  Beledros Witherbloom untaps all (or many) permanents, refreshing Caribou Range's tap activation.
• Jorn, God of Winter // Kaldring, the Rimestaff

  2G1UB

  Legendary Snow Creature — God // Legendary Snow ArtifactBGU

  Jorn, God of Winter untaps all (or many) permanents, refreshing Caribou Range's tap activation.
• Prophet of Kruphix

  3GU

  Creature — Human WizardGU

  Prophet of Kruphix untaps all (or many) permanents, refreshing Caribou Range's tap activation.
• Bumi, Unleashed

  3RG

  Legendary Creature — Human Noble AllyGR

  Bumi, Unleashed untaps all (or many) permanents, refreshing Caribou Range's tap activation.
• Wilderness Reclamation

  3G

  EnchantmentG

  Wilderness Reclamation untaps all (or many) permanents, refreshing Caribou Range's tap activation.
• Seedborn Muse

  3GG

  Creature — SpiritG

  Seedborn Muse untaps all (or many) permanents, refreshing Caribou Range's tap activation.
• Sword of Feast and Famine

  3

  Artifact — EquipmentC

  Sword of Feast and Famine untaps all (or many) permanents, refreshing Caribou Range's tap activation.
• Zacama, Primal Calamity

  6RGW

  Legendary Creature — Elder DinosaurGRW

  Zacama, Primal Calamity untaps all (or many) permanents, refreshing Caribou Range's tap activation.
• Nature's Will

  2GG

  EnchantmentG

  Nature's Will untaps all (or many) permanents, refreshing Caribou Range's tap activation.
• Emrakul, the Exigent Doom

  10

  Legendary Creature — EldraziC

  Emrakul, the Exigent Doom untaps all (or many) permanents, refreshing Caribou Range's tap activation.
• Awakening

  2GG

  EnchantmentG

  Awakening untaps all (or many) permanents, refreshing Caribou Range's tap activation.
• Reset

  UU

  InstantU

  Reset untaps all (or many) permanents, refreshing Caribou Range's tap activation.
• Rude Awakening

  4G

  SorceryG

  Rude Awakening untaps all (or many) permanents, refreshing Caribou Range's tap activation.
• Bear Umbra

  2GG

  Enchantment — AuraG

  Bear Umbra untaps all (or many) permanents, refreshing Caribou Range's tap activation.
• Bloodline Recollector // Ancestral Craving

  1BB

  Creature — Vampire Warlock // InstantB

  Caribou Range is a sacrifice outlet, enabling Bloodline Recollector's death or sacrifice trigger.
• Chevill, Bane of Monsters

  BG

  Legendary Creature — Human RogueBG

  Caribou Range is a sacrifice outlet, enabling Chevill, Bane of Monsters's death or sacrifice trigger.
• Private Research

  U

  Enchantment — AuraU

  Caribou Range is a sacrifice outlet, enabling Private Research's death or sacrifice trigger.
• Shaile, Dean of Radiance // Embrose, Dean of Shadow

  1W2BB

  Legendary Creature — Bird Cleric // Legendary Creature — Human WarlockBW

  Caribou Range is a sacrifice outlet, enabling Shaile, Dean of Radiance's death or sacrifice trigger.
• The Serpent Society

  1BG

  Legendary Creature — Human Snake VillainBG

  Caribou Range is a sacrifice outlet, enabling The Serpent Society's death or sacrifice trigger.
• Quest for the Gravelord

  B

  EnchantmentB

  Caribou Range is a sacrifice outlet, enabling Quest for the Gravelord's death or sacrifice trigger.
• Bequeathal

  G

  Enchantment — AuraG

  Caribou Range is a sacrifice outlet, enabling Bequeathal's death or sacrifice trigger.
• Endless Evil

  2U

  Enchantment — AuraU

  Caribou Range is a sacrifice outlet, enabling Endless Evil's death or sacrifice trigger.