Confidence:StrongSolidPlausibleTentativeSpeculative

• Trickster Mage

  U

  Creature — Human SpellshaperU

  Untap loop: each side can untap what the other taps — a genuine mutual refresh engine.
• Mind Over Matter

  2UUUU

  EnchantmentU

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

  3G

  Creature — Centaur DetectiveG

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

  2R

  SorceryR

  Fiery Gambit untaps all (or many) permanents, refreshing Thawing Glaciers's tap activation.
• Prophet of Kruphix

  3GU

  Creature — Human WizardGU

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

  3RG

  Legendary Creature — Human Noble AllyGR

  Bumi, Unleashed untaps all (or many) permanents, refreshing Thawing Glaciers's tap activation.
• Merrow Reejerey

  2U

  Creature — Merfolk SoldierU

  Untap loop: each side can untap what the other taps — a genuine mutual refresh engine.
• Zacama, Primal Calamity

  6RGW

  Legendary Creature — Elder DinosaurGRW

  Zacama, Primal Calamity untaps all (or many) permanents, refreshing Thawing Glaciers's tap activation.
• Seedborn Muse

  3GG

  Creature — SpiritG

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

  3G

  EnchantmentG

  Wilderness Reclamation untaps all (or many) permanents, refreshing Thawing Glaciers's tap activation.
• Sword of Feast and Famine

  3

  Artifact — EquipmentC

  Sword of Feast and Famine untaps all (or many) permanents, refreshing Thawing Glaciers's tap activation.
• Gandalf the Grey

  3UR

  Legendary Creature — Avatar WizardRU

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

  5BG

  Legendary Creature — Elder DragonBG

  Beledros Witherbloom untaps all (or many) permanents, refreshing Thawing Glaciers's tap activation.
• Emrakul, the Exigent Doom

  10

  Legendary Creature — EldraziC

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

  2GG

  EnchantmentG

  Nature's Will untaps all (or many) permanents, refreshing Thawing Glaciers's tap activation.
• Awakening

  2GG

  EnchantmentG

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

  UU

  InstantU

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

  4G

  SorceryG

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

  2GG

  Enchantment — AuraG

  Bear Umbra untaps all (or many) permanents, refreshing Thawing Glaciers's tap activation.
• Song of Creation

  1GUR

  EnchantmentGRU

  Thawing Glaciers bounces a permanent, enabling Song of Creation's recast / spell-cast trigger.
• God-Eternal Oketra

  3WW

  Legendary Creature — Zombie GodW

  Thawing Glaciers bounces a permanent, enabling God-Eternal Oketra's recast / spell-cast trigger.
• Ambling Stormshell

  3UU

  Creature — TurtleU

  Thawing Glaciers bounces a permanent, enabling Ambling Stormshell's recast / spell-cast trigger.
• Shanid, Sleepers' Scourge

  1RWB

  Legendary Creature — Human KnightBRW

  Thawing Glaciers bounces a permanent, enabling Shanid, Sleepers' Scourge's recast / spell-cast trigger.
• Elemental Mascot

  1UR

  Creature — Elemental BirdRU

  Thawing Glaciers bounces a permanent, enabling Elemental Mascot's recast / spell-cast trigger.
• Lord of the Nazgûl

  3UB

  Legendary Creature — Wraith NobleBU

  Thawing Glaciers bounces a permanent, enabling Lord of the Nazgûl's recast / spell-cast trigger.