Confidence:StrongSolidPlausibleTentativeSpeculative

• 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.
• Veteran Beastrider

  1GW

  Creature — Human KnightGW

  Veteran Beastrider untaps all (or many) permanents, refreshing A-Urza, Powerstone Prodigy's tap activation.
• Plargg, Dean of Chaos // Augusta, Dean of Order

  1R2W

  Legendary Creature — Orc Shaman // Legendary Creature — Human ClericRW

  Plargg, Dean of Chaos untaps all (or many) permanents, refreshing A-Urza, Powerstone Prodigy's tap activation.
• Intruder Alarm

  2U

  EnchantmentU

  Intruder Alarm untaps all (or many) permanents, refreshing A-Urza, Powerstone Prodigy's tap activation.
• Dazzling Theater // Prop Room

  3W2W

  Enchantment — Room // Enchantment — RoomW

  Dazzling Theater untaps all (or many) permanents, refreshing A-Urza, Powerstone Prodigy's tap activation.
• Éomer, Marshal of Rohan

  2RR

  Legendary Creature — Human KnightR

  Éomer, Marshal of Rohan untaps all (or many) permanents, refreshing A-Urza, Powerstone Prodigy's tap activation.
• Delney, Streetwise Lookout

  2W

  Legendary Creature — Human ScoutW

  Delney, Streetwise Lookout makes A-Urza, Powerstone Prodigy's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Annie Joins Up

  1RGW

  Legendary EnchantmentGRW

  Annie Joins Up makes A-Urza, Powerstone Prodigy's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Unstoppable Plan

  2U

  EnchantmentU

  Unstoppable Plan untaps all (or many) permanents, refreshing A-Urza, Powerstone Prodigy's tap activation.
• Ivorytusk Fortress

  2WBG

  Creature — ElephantBGW

  Ivorytusk Fortress untaps all (or many) permanents, refreshing A-Urza, Powerstone Prodigy's tap activation.
• Jace, Ingenious Mind-Mage

  4UU

  Legendary Planeswalker — JaceU

  Jace, Ingenious Mind-Mage untaps all (or many) permanents, refreshing A-Urza, Powerstone Prodigy's tap activation.
• Roaming Throne

  4

  Artifact Creature — GolemC

  Roaming Throne makes A-Urza, Powerstone Prodigy's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Betor, Kin to All

  2WBG

  Legendary Creature — Spirit DragonBGW

  Betor, Kin to All untaps all (or many) permanents, refreshing A-Urza, Powerstone Prodigy's tap activation.
• Aurelia, the Warleader

  2RRWW

  Legendary Creature — AngelRW

  Aurelia, the Warleader untaps all (or many) permanents, refreshing A-Urza, Powerstone Prodigy's tap activation.
• Combat Celebrant

  2R

  Creature — Human WarriorR

  Combat Celebrant untaps all (or many) permanents, refreshing A-Urza, Powerstone Prodigy's tap activation.
• Mirror Room // Fractured Realm

  2U5UU

  Enchantment — Room // Enchantment — RoomU

  Mirror Room makes A-Urza, Powerstone Prodigy's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Cool but Rude

  1R

  Enchantment — ClassR

  Both cards trigger when a card is discarded — they fire together.
• Anzrag, the Quake-Mole

  2RG

  Legendary Creature — Mole GodGR

  Anzrag, the Quake-Mole untaps all (or many) permanents, refreshing A-Urza, Powerstone Prodigy's tap activation.
• Ahn-Crop Champion

  2GW

  Creature — Human WarriorGW

  Ahn-Crop Champion untaps all (or many) permanents, refreshing A-Urza, Powerstone Prodigy's tap activation.
• Najeela, the Blade-Blossom

  2R

  Legendary Creature — Human WarriorBGRUW

  Najeela, the Blade-Blossom untaps all (or many) permanents, refreshing A-Urza, Powerstone Prodigy's tap activation.
• Archfiend of Ifnir

  3BB

  Creature — DemonB

  Both cards trigger when a card is discarded — they fire together.
• Tifa, Martial Artist

  1RGW

  Legendary Creature — Human MonkGRW

  Tifa, Martial Artist untaps all (or many) permanents, refreshing A-Urza, Powerstone Prodigy's tap activation.
• Paradox Engine

  5

  Legendary ArtifactC

  Paradox Engine untaps all (or many) permanents, refreshing A-Urza, Powerstone Prodigy's tap activation.
• Wizard's Staff

  1U

  Artifact — EquipmentU

  Wizard's Staff makes A-Urza, Powerstone Prodigy's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Moraug, Fury of Akoum

  4RR

  Legendary Creature — Minotaur WarriorR

  Moraug, Fury of Akoum untaps all (or many) permanents, refreshing A-Urza, Powerstone Prodigy's tap activation.