Confidence:StrongSolidPlausibleTentativeSpeculative

• Intellectual Offering

  4U

  InstantU

  Intellectual Offering untaps all (or many) permanents, refreshing Slate of Ancestry's tap activation.
• Unstoppable Plan

  2U

  EnchantmentU

  Unstoppable Plan untaps all (or many) permanents, refreshing Slate of Ancestry's tap activation.
• Unwinding Clock

  4

  ArtifactC

  Unwinding Clock untaps all (or many) permanents, refreshing Slate of Ancestry's tap activation.
• Seedborn Muse

  3GG

  Creature — SpiritG

  Seedborn Muse untaps all (or many) permanents, refreshing Slate of Ancestry's tap activation.
• Paradox Engine

  5

  Legendary ArtifactC

  Paradox Engine untaps all (or many) permanents, refreshing Slate of Ancestry's tap activation.
• Dramatic Reversal

  1U

  InstantU

  Dramatic Reversal untaps all (or many) permanents, refreshing Slate of Ancestry's tap activation.
• Blinkmoth Infusion

  12UU

  InstantU

  Blinkmoth Infusion untaps all (or many) permanents, refreshing Slate of Ancestry's tap activation.
• Fiery Gambit

  2R

  SorceryR

  Fiery Gambit untaps lands, fueling Slate of Ancestry's mana-hungry effect.
• Innocuous Researcher

  3G

  Creature — Centaur DetectiveG

  Innocuous Researcher untaps lands, fueling Slate of Ancestry's mana-hungry effect.
• Stinkweed Imp

  2B

  Creature — ImpB

  Slate of Ancestry draws a large number of cards, enabling Stinkweed Imp's draw-payoff or weaponized-draw effect.
• Kid Loki

  U

  Legendary Creature — God Hero VillainU

  Slate of Ancestry draws a large number of cards, enabling Kid Loki's draw-payoff or weaponized-draw effect.
• Toothy, Imaginary Friend

  3U

  Legendary Creature — IllusionU

  Slate of Ancestry draws a large number of cards, enabling Toothy, Imaginary Friend's draw-payoff or weaponized-draw effect.
• Time Spiral

  4UU

  SorceryU

  Time Spiral untaps lands, fueling Slate of Ancestry's mana-hungry effect.
• Red Ghost, Intangible Genius

  2UR

  Legendary Creature — Human Scientist VillainRU

  Slate of Ancestry draws a large number of cards, enabling Red Ghost, Intangible Genius's draw-payoff or weaponized-draw effect.
• Sheoldred, the Apocalypse

  2BB

  Legendary Creature — Phyrexian PraetorB

  Slate of Ancestry draws a large number of cards, enabling Sheoldred, the Apocalypse's draw-payoff or weaponized-draw effect.
• Nissa, Vastwood Seer // Nissa, Sage Animist

  2G

  Legendary Creature — Elf Scout // Legendary Planeswalker — NissaG

  Nissa, Vastwood Seer untaps lands, fueling Slate of Ancestry's mana-hungry effect.
• Niv-Mizzet, Parun

  UUURRR

  Legendary Creature — Dragon WizardRU

  Slate of Ancestry draws a large number of cards, enabling Niv-Mizzet, Parun's draw-payoff or weaponized-draw effect.
• Ob Nixilis Reignited

  3BB

  Legendary Planeswalker — NixilisB

  Slate of Ancestry draws a large number of cards, enabling Ob Nixilis Reignited's draw-payoff or weaponized-draw effect.
• Teferi, Hero of Dominaria

  3WU

  Legendary Planeswalker — TeferiUW

  Slate of Ancestry draws a large number of cards, enabling Teferi, Hero of Dominaria's draw-payoff or weaponized-draw effect.
• Jolrael, Mwonvuli Recluse

  1G

  Legendary Creature — Human DruidG

  Slate of Ancestry draws a large number of cards, enabling Jolrael, Mwonvuli Recluse's draw-payoff or weaponized-draw effect.
• Necroplasm

  1BB

  Creature — OozeB

  Slate of Ancestry draws a large number of cards, enabling Necroplasm's draw-payoff or weaponized-draw effect.
• Mischievous Mystic

  1U

  Creature — Human WizardU

  Slate of Ancestry draws a large number of cards, enabling Mischievous Mystic's draw-payoff or weaponized-draw effect.
• The Council of Four

  3WU

  Legendary Creature — Human NobleUW

  Slate of Ancestry draws a large number of cards, enabling The Council of Four's draw-payoff or weaponized-draw effect.
• Worf, Son of Mogh

  1RW

  Legendary Creature — Klingon Warrior OfficerRW

  Slate of Ancestry draws a large number of cards, enabling Worf, Son of Mogh's draw-payoff or weaponized-draw effect.
• Niv-Mizzet, the Firemind

  2UURR

  Legendary Creature — Dragon WizardRU

  Slate of Ancestry draws a large number of cards, enabling Niv-Mizzet, the Firemind's draw-payoff or weaponized-draw effect.