Confidence:StrongSolidPlausibleTentativeSpeculative

• Innocuous Researcher

  3G

  Creature — Centaur DetectiveG

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

  2R

  SorceryR

  Fiery Gambit untaps all (or many) permanents, refreshing Underworld Connections's tap activation.
• Jorn, God of Winter // Kaldring, the Rimestaff

  2G1UB

  Legendary Snow Creature — God // Legendary Snow ArtifactBGU

  Jorn, God of Winter untaps all (or many) permanents, refreshing Underworld Connections's tap activation.
• Prophet of Kruphix

  3GU

  Creature — Human WizardGU

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

  3RG

  Legendary Creature — Human Noble AllyGR

  Bumi, Unleashed untaps all (or many) permanents, refreshing Underworld Connections's tap activation.
• Zacama, Primal Calamity

  6RGW

  Legendary Creature — Elder DinosaurGRW

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

  3GG

  Creature — SpiritG

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

  3G

  EnchantmentG

  Wilderness Reclamation untaps all (or many) permanents, refreshing Underworld Connections's tap activation.
• Queza, Augur of Agonies

  1WUB

  Legendary Creature — Octopus AdvisorBUW

  Draw pair: both cards engage with card draw. With a damage-or-draw trigger between them they form a draw engine.
• Sword of Feast and Famine

  3

  Artifact — EquipmentC

  Sword of Feast and Famine untaps all (or many) permanents, refreshing Underworld Connections's tap activation.
• Beledros Witherbloom

  5BG

  Legendary Creature — Elder DragonBG

  Beledros Witherbloom untaps all (or many) permanents, refreshing Underworld Connections's tap activation.
• Horizon Chimera

  2GU

  Creature — ChimeraGU

  Draw pair: both cards engage with card draw. With a damage-or-draw trigger between them they form a draw engine.
• Nature's Will

  2GG

  EnchantmentG

  Nature's Will untaps all (or many) permanents, refreshing Underworld Connections's tap activation.
• Shabraz, the Skyshark

  3WU

  Legendary Creature — Shark BirdUW

  Draw pair: both cards engage with card draw. With a damage-or-draw trigger between them they form a draw engine.
• Awakening

  2GG

  EnchantmentG

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

  UU

  InstantU

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

  4G

  SorceryG

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

  2GG

  Enchantment — AuraG

  Bear Umbra untaps all (or many) permanents, refreshing Underworld Connections's tap activation.
• Swords to Plowshares

  W

  InstantW

  Swords to Plowshares gains life in big chunks or many small hits, fueling Underworld Connections's life-gain payoff.
• Garruk, Apex Predator

  5BG

  Legendary Planeswalker — GarrukBG

  Garruk, Apex Predator gains life in big chunks or many small hits, fueling Underworld Connections's life-gain payoff.
• Solitude

  3WW

  Creature — Elemental IncarnationW

  Solitude gains life in big chunks or many small hits, fueling Underworld Connections's life-gain payoff.
• Huatli, Warrior Poet

  3RW

  Legendary Planeswalker — HuatliRW

  Huatli, Warrior Poet gains life in big chunks or many small hits, fueling Underworld Connections's life-gain payoff.
• Kaya's Wrath

  WWBB

  SorceryBW

  Kaya's Wrath gains life in big chunks or many small hits, fueling Underworld Connections's life-gain payoff.
• Eriette of the Charmed Apple

  1WB

  Legendary Creature — Human WarlockBW

  Eriette of the Charmed Apple gains life in big chunks or many small hits, fueling Underworld Connections's life-gain payoff.
• Emeritus of Truce // Swords to Plowshares

  1WWW

  Creature — Cat Cleric // InstantW

  Emeritus of Truce gains life in big chunks or many small hits, fueling Underworld Connections's life-gain payoff.