Confidence:StrongSolidPlausibleTentativeSpeculative

• Rustvine Cultivator

  G

  Creature — Phyrexian Elf DruidG

  Untap loop: each side can untap what the other taps — a genuine mutual refresh engine.
• Trade Caravan

  W

  Creature — Human NomadW

  Untap loop: each side can untap what the other taps — a genuine mutual refresh engine.
• Intruder Alarm

  2U

  EnchantmentU

  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.
• Lost Jitte

  1

  Legendary Artifact — EquipmentC

  Untap loop: each side can untap what the other taps — a genuine mutual refresh engine.
• Sky Hussar

  3WU

  Creature — Human KnightUW

  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.
• Aura of Dominion

  UU

  Enchantment — AuraU

  Token-fuel engine: one side keeps producing untapped tokens that pay the other's tap costs, and the output feeds the loop again — Squirrel Nest with Earthcraft is the classic shape.
• Tolarian Kraken

  4UU

  Creature — KrakenU

  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.
• Earthcraft

  1G

  EnchantmentG

  Token-fuel engine: one side keeps producing untapped tokens that pay the other's tap costs, and the output feeds the loop again — Squirrel Nest with Earthcraft is the classic shape.
• Basri, Tomorrow's Champion

  W

  Legendary Creature — Human KnightW

  Both cards produce the same kind of effect (shared token subtype).
• Ajani, Nacatl Pariah // Ajani, Nacatl Avenger

  1W

  Legendary Creature — Cat Warrior // Legendary Planeswalker — AjaniRW

  Both cards produce the same kind of effect (shared token subtype).
• Lita, Mechanical Engineer

  2W

  Legendary Artifact Creature — ArtificerW

  Lita, Mechanical Engineer untaps all (or many) permanents, refreshing Worzel, the Protector's tap activation.
• Copperhorn Scout

  G

  Creature — Elf ScoutG

  Copperhorn Scout untaps all (or many) permanents, refreshing Worzel, the Protector's tap activation.
• Innocuous Researcher

  3G

  Creature — Centaur DetectiveG

  Innocuous Researcher untaps all (or many) permanents, refreshing Worzel, the Protector's tap activation.
• Fiery Gambit

  2R

  SorceryR

  Fiery Gambit untaps all (or many) permanents, refreshing Worzel, the Protector's tap activation.
• White Plume Adventurer

  2W

  Creature — Orc ClericW

  White Plume Adventurer untaps all (or many) permanents, refreshing Worzel, the Protector'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 Worzel, the Protector's tap activation.
• Jace, Ingenious Mind-Mage

  4UU

  Legendary Planeswalker — JaceU

  Jace, Ingenious Mind-Mage untaps all (or many) permanents, refreshing Worzel, the Protector's tap activation.
• Murkfiend Liege

  2G/UG/UG/U

  Creature — HorrorGU

  Murkfiend Liege untaps all (or many) permanents, refreshing Worzel, the Protector's tap activation.
• Aggravated Assault

  2R

  EnchantmentR

  Aggravated Assault untaps all (or many) permanents, refreshing Worzel, the Protector's tap activation.
• Urtet, Remnant of Memnarch

  3

  Legendary Artifact Creature — MyrBGRUW

  Urtet, Remnant of Memnarch untaps all (or many) permanents, refreshing Worzel, the Protector's tap activation.
• The Thirteenth Doctor

  1GU

  Legendary Creature — Time Lord DoctorGU

  The Thirteenth Doctor untaps all (or many) permanents, refreshing Worzel, the Protector's tap activation.
• Veteran Beastrider

  1GW

  Creature — Human KnightGW

  Veteran Beastrider untaps all (or many) permanents, refreshing Worzel, the Protector's tap activation.
• Jiang Yanggu, Never Alone

  3G

  Legendary Creature — Human DruidG

  Jiang Yanggu, Never Alone untaps all (or many) permanents, refreshing Worzel, the Protector's tap activation.
• Merrow Commerce

  1U

  Kindred Enchantment — MerfolkU

  Merrow Commerce untaps all (or many) permanents, refreshing Worzel, the Protector's tap activation.
• Estrid, the Masked

  1GWU

  Legendary Planeswalker — EstridGUW

  Estrid, the Masked untaps all (or many) permanents, refreshing Worzel, the Protector's tap activation.