Confidence:StrongSolidPlausibleTentativeSpeculative

• Captain of the Mists

  2U

  Creature — Human WizardU

  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 Castle Ardenvale's tap activation.
• Innocuous Researcher

  3G

  Creature — Centaur DetectiveG

  Innocuous Researcher untaps all (or many) permanents, refreshing Castle Ardenvale's tap activation.
• Magus of the Candelabra

  G

  Creature — Human WizardG

  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.
• Oath of Eorl

  3RW

  Enchantment — SagaRW

  Both cards produce the same kind of effect (shared token subtype).
• Candelabra of Tawnos

  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.
• Jerren, Corrupted Bishop // Ormendahl, the Corrupter

  2B

  Legendary Creature — Human Cleric // Legendary Creature — DemonB

  Both cards produce the same kind of effect (shared token subtype).
• General's Enforcer

  WB

  Creature — Human SoldierBW

  Both cards produce the same kind of effect (shared token subtype).
• Lossarnach Captain

  3W

  Creature — Human SoldierW

  Both cards produce the same kind of effect (shared token subtype).
• Beledros Witherbloom

  5BG

  Legendary Creature — Elder DragonBG

  Beledros Witherbloom untaps all (or many) permanents, refreshing Castle Ardenvale's tap activation.
• 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.
• Saryth, the Viper's Fang

  2GG

  Legendary Creature — Human WarlockG

  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.
• Prophet of Kruphix

  3GU

  Creature — Human WizardGU

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

  3RG

  Legendary Creature — Human Noble AllyGR

  Bumi, Unleashed untaps all (or many) permanents, refreshing Castle Ardenvale's tap activation.
• Fugitive of the Judoon

  4G

  Enchantment — SagaG

  Both cards produce the same kind of effect (shared token subtype).
• Wilderness Reclamation

  3G

  EnchantmentG

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

  3GG

  Creature — SpiritG

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

  3

  Artifact — EquipmentC

  Sword of Feast and Famine untaps all (or many) permanents, refreshing Castle Ardenvale's tap activation.
• Sigarda, Heron's Grace

  3GW

  Legendary Creature — AngelGW

  Both cards produce the same kind of effect (shared token subtype).
• Jirina Kudro

  1RWB

  Legendary Creature — Human SoldierBRW

  Both cards produce the same kind of effect (shared token subtype).
• Nature's Will

  2GG

  EnchantmentG

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

  10

  Legendary Creature — EldraziC

  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.
• Awakening

  2GG

  EnchantmentG

  Awakening untaps all (or many) permanents, refreshing Castle Ardenvale's tap activation.
• Stangg

  4RG

  Legendary Creature — Human WarriorGR

  Both cards produce the same kind of effect (shared token subtype).
• Hope Tender

  1G

  Creature — Human 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.