Confidence:StrongSolidPlausibleTentativeSpeculative

• Intellectual Offering

  4U

  InstantU

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

  2U

  EnchantmentU

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

  4

  ArtifactC

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

  3GG

  Creature — SpiritG

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

  5

  Legendary ArtifactC

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

  1U

  InstantU

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

  12UU

  InstantU

  Blinkmoth Infusion untaps all (or many) permanents, refreshing Keening Stone's tap activation.
• The Haunt of Hightower

  4BB

  Legendary Creature — VampireB

  Keening Stone mills (or dredges) cards into your graveyard, and The Haunt of Hightower pays off whenever a card — or a card of the type it names — is put into a graveyard from anywhere; the more it mills, the likelier it hits.
• Bloodchief Ascension

  B

  EnchantmentB

  Keening Stone mills (or dredges) cards into your graveyard, and Bloodchief Ascension pays off whenever a card — or a card of the type it names — is put into a graveyard from anywhere; the more it mills, the likelier it hits.
• Vulturous Zombie

  3BG

  Creature — Plant ZombieBG

  Keening Stone mills (or dredges) cards into your graveyard, and Vulturous Zombie pays off whenever a card — or a card of the type it names — is put into a graveyard from anywhere; the more it mills, the likelier it hits.
• Quest for Ancient Secrets

  U

  EnchantmentU

  Keening Stone mills (or dredges) cards into your graveyard, and Quest for Ancient Secrets pays off whenever a card — or a card of the type it names — is put into a graveyard from anywhere; the more it mills, the likelier it hits.
• Nihilith

  4BB

  Creature — HorrorB

  Keening Stone mills (or dredges) cards into your graveyard, and Nihilith pays off whenever a card — or a card of the type it names — is put into a graveyard from anywhere; the more it mills, the likelier it hits.
• Shifting Woodland

  LandG

  Graveyard copier: one card stocks the graveyard (mill, surveil, dredge) and the other can repeatedly become a copy of a card that's there, borrowing its abilities without recasting it — the Shifting Woodland + Aftermath Analyst shape.
• Fiery Gambit

  2R

  SorceryR

  Fiery Gambit untaps lands, fueling Keening Stone's mana-hungry effect.
• Innocuous Researcher

  3G

  Creature — Centaur DetectiveG

  Innocuous Researcher untaps lands, fueling Keening Stone's mana-hungry effect.
• Time Spiral

  4UU

  SorceryU

  Time Spiral untaps lands, fueling Keening Stone's mana-hungry effect.
• Sefris of the Hidden Ways

  WUB

  Legendary Creature — Human WizardBUW

  Keening Stone mills (or dredges) cards into your graveyard, and Sefris of the Hidden Ways pays off whenever a card — or a card of the type it names — is put into a graveyard from anywhere; the more it mills, the likelier it hits.
• Dennick, Pious Apprentice // Dennick, Pious Apparition

  WU

  Legendary Creature — Human Soldier // Legendary Creature — Spirit SoldierUW

  Keening Stone mills (or dredges) cards into your graveyard, and Dennick, Pious Apprentice pays off whenever a card — or a card of the type it names — is put into a graveyard from anywhere; the more it mills, the likelier it hits.
• Sand Scout

  1W

  Creature — Human ScoutW

  Keening Stone mills (or dredges) cards into your graveyard, and Sand Scout pays off whenever a card — or a card of the type it names — is put into a graveyard from anywhere; the more it mills, the likelier it hits.
• Nissa, Vastwood Seer // Nissa, Sage Animist

  2G

  Legendary Creature — Elf Scout // Legendary Planeswalker — NissaG

  Nissa, Vastwood Seer untaps lands, fueling Keening Stone's mana-hungry effect.
• Titania, Voice of Gaea

  1GG

  Legendary Creature — ElementalG

  Keening Stone mills (or dredges) cards into your graveyard, and Titania, Voice of Gaea pays off whenever a card — or a card of the type it names — is put into a graveyard from anywhere; the more it mills, the likelier it hits.
• Robot Domination

  3B

  Enchantment — PlanB

  Keening Stone mills (or dredges) cards into your graveyard, and Robot Domination pays off whenever a card — or a card of the type it names — is put into a graveyard from anywhere; the more it mills, the likelier it hits.
• Rewind

  2UU

  InstantU

  Rewind untaps lands, fueling Keening Stone's mana-hungry effect.
• Beledros Witherbloom

  5BG

  Legendary Creature — Elder DragonBG

  Beledros Witherbloom untaps lands, fueling Keening Stone's mana-hungry effect.
• Slogurk, the Overslime

  1GU

  Legendary Creature — OozeGU

  Keening Stone mills (or dredges) cards into your graveyard, and Slogurk, the Overslime pays off whenever a card — or a card of the type it names — is put into a graveyard from anywhere; the more it mills, the likelier it hits.