Confidence:StrongSolidPlausibleTentativeSpeculative

• Intellectual Offering

  4U

  InstantU

  Intellectual Offering untaps all (or many) permanents, refreshing Ice Cauldron's tap activation.
• Unstoppable Plan

  2U

  EnchantmentU

  Unstoppable Plan untaps all (or many) permanents, refreshing Ice Cauldron's tap activation.
• Unwinding Clock

  4

  ArtifactC

  Unwinding Clock untaps all (or many) permanents, refreshing Ice Cauldron's tap activation.
• Seedborn Muse

  3GG

  Creature — SpiritG

  Seedborn Muse untaps all (or many) permanents, refreshing Ice Cauldron's tap activation.
• Paradox Engine

  5

  Legendary ArtifactC

  Paradox Engine untaps all (or many) permanents, refreshing Ice Cauldron's tap activation.
• Dramatic Reversal

  1U

  InstantU

  Dramatic Reversal untaps all (or many) permanents, refreshing Ice Cauldron's tap activation.
• Blinkmoth Infusion

  12UU

  InstantU

  Blinkmoth Infusion untaps all (or many) permanents, refreshing Ice Cauldron's tap activation.
• Innkeeper's Talent

  1G

  Enchantment — ClassG

  Counter synergy: both cards work with the same kind of counters, so their effects stack in a counters deck. Not necessarily a closed loop on its own.
• Song of Creation

  1GUR

  EnchantmentGRU

  Ice Cauldron lets you cast/play from exile, enabling Song of Creation's exile-recursion loop.
• Baron Helmut Zemo

  BBB

  Legendary Creature — Human Noble VillainB

  Ice Cauldron lets you cast/play from exile, enabling Baron Helmut Zemo's exile-recursion loop.
• Hydro-Man, Fluid Felon

  UU

  Legendary Creature — Elemental VillainU

  Ice Cauldron lets you cast/play from exile, enabling Hydro-Man, Fluid Felon's exile-recursion loop.
• Temporal Extortion

  BBBB

  SorceryB

  Ice Cauldron lets you cast/play from exile, enabling Temporal Extortion's exile-recursion loop.
• Shanid, Sleepers' Scourge

  1RWB

  Legendary Creature — Human KnightBRW

  Ice Cauldron lets you cast/play from exile, enabling Shanid, Sleepers' Scourge's exile-recursion loop.
• Quintorius Kand

  3RW

  Legendary Planeswalker — QuintoriusRW

  Ice Cauldron lets you cast/play from exile, enabling Quintorius Kand's exile-recursion loop.
• The Circle of Loyalty

  4WW

  Legendary ArtifactW

  Ice Cauldron lets you cast/play from exile, enabling The Circle of Loyalty's exile-recursion loop.
• Jodah, the Unifier

  WUBRG

  Legendary Creature — Human WizardBGRUW

  Ice Cauldron lets you cast/play from exile, enabling Jodah, the Unifier's exile-recursion loop.
• Kozilek, Butcher of Truth

  10

  Legendary Creature — EldraziC

  Ice Cauldron lets you cast/play from exile, enabling Kozilek, Butcher of Truth's exile-recursion loop.
• Kasla, the Broken Halo

  3URW

  Legendary Creature — Angel AllyRUW

  Ice Cauldron lets you cast/play from exile, enabling Kasla, the Broken Halo's exile-recursion loop.
• Lavinia, Foil to Conspiracy

  1W/UW/U

  Legendary Creature — Human DetectiveUW

  Ice Cauldron lets you cast/play from exile, enabling Lavinia, Foil to Conspiracy's exile-recursion loop.
• Runaway Steam-Kin

  1R

  Creature — ElementalR

  Ice Cauldron lets you cast/play from exile, enabling Runaway Steam-Kin's exile-recursion loop.
• Dash Hopes

  BB

  InstantB

  Ice Cauldron lets you cast/play from exile, enabling Dash Hopes's exile-recursion loop.
• Fire Lord Zuko

  RWB

  Legendary Creature — Human Noble AllyBRW

  Ice Cauldron lets you cast/play from exile, enabling Fire Lord Zuko's exile-recursion loop.
• Malcolm, the Eyes

  UR

  Legendary Creature — Siren PirateRU

  Ice Cauldron lets you cast/play from exile, enabling Malcolm, the Eyes's exile-recursion loop.
• Malicious Affliction

  BB

  InstantB

  Ice Cauldron lets you cast/play from exile, enabling Malicious Affliction's exile-recursion loop.
• Deathbringer Liege

  2W/BW/BW/B

  Creature — HorrorBW

  Ice Cauldron lets you cast/play from exile, enabling Deathbringer Liege's exile-recursion loop.