Confidence:StrongSolidPlausibleTentativeSpeculative

• Aggravated Assault✓

  2R

  EnchantmentR

  Refuel loop: one card's payoff untaps your lands, paying for the other's activation again — repeatable every turn, and often infinite.
• Najeela, the Blade-Blossom✓

  2R

  Legendary Creature — Human WarriorBGRUW

  Refuel loop: one card's payoff untaps your lands, paying for the other's activation again — repeatable every turn, and often infinite.
• Hazel of the Rootbloom

  2BG

  Legendary Creature — Squirrel DruidBG

  Bear Umbra untaps all (or many) permanents, refreshing Hazel of the Rootbloom's tap activation.
• Wrenn and Realmbreaker

  1GG

  Legendary Planeswalker — WrennG

  Bear Umbra untaps all (or many) permanents, refreshing Wrenn and Realmbreaker's tap activation.
• Lithoform Blight

  1B

  Enchantment — AuraB

  Bear Umbra untaps all (or many) permanents, refreshing Lithoform Blight's tap activation.
• Welcome to . . . // Jurassic Park

  1GG

  Enchantment — Saga // Legendary LandG

  Bear Umbra untaps all (or many) permanents, refreshing Welcome to . . .'s tap activation.
• Alpine Moon

  R

  EnchantmentR

  Bear Umbra untaps all (or many) permanents, refreshing Alpine Moon's tap activation.
• Ojer Taq, Deepest Foundation // Temple of Civilization

  4WW

  Legendary Creature — God // LandW

  Bear Umbra untaps all (or many) permanents, refreshing Ojer Taq, Deepest Foundation's tap activation.
• Emeria's Call // Emeria, Shattered Skyclave

  4WWW

  Sorcery // LandW

  Bear Umbra untaps all (or many) permanents, refreshing Emeria's Call's tap activation.
• Maze's End

  LandC

  Bear Umbra untaps all (or many) permanents, refreshing Maze's End's tap activation.
• Great Divide Guide

  1G

  Creature — Human Scout AllyG

  Bear Umbra untaps all (or many) permanents, refreshing Great Divide Guide's tap activation.
• Karakas

  Legendary LandW

  Bear Umbra untaps all (or many) permanents, refreshing Karakas's tap activation.
• Abundant Growth

  G

  Enchantment — AuraG

  Bear Umbra untaps all (or many) permanents, refreshing Abundant Growth's tap activation.
• Restless Fortress

  LandBW

  Bear Umbra untaps all (or many) permanents, refreshing Restless Fortress's tap activation.
• Boseiju, Who Endures

  Legendary LandG

  Bear Umbra untaps all (or many) permanents, refreshing Boseiju, Who Endures's tap activation.
• Aclazotz, Deepest Betrayal // Temple of the Dead

  3BB

  Legendary Creature — Bat God // LandB

  Bear Umbra untaps all (or many) permanents, refreshing Aclazotz, Deepest Betrayal's tap activation.
• Baylen, the Haymaker

  RGW

  Legendary Creature — Rabbit WarriorGRW

  Bear Umbra untaps all (or many) permanents, refreshing Baylen, the Haymaker's tap activation.
• Sidequest: Catch a Fish // Cooking Campsite

  2W

  Enchantment // LandW

  Bear Umbra untaps all (or many) permanents, refreshing Sidequest: Catch a Fish's tap activation.
• Joiner Adept

  1G

  Creature — Elf DruidG

  Bear Umbra untaps all (or many) permanents, refreshing Joiner Adept's tap activation.
• Liliana of the Dark Realms

  2BB

  Legendary Planeswalker — LilianaB

  Bear Umbra untaps all (or many) permanents, refreshing Liliana of the Dark Realms's tap activation.
• Nature's Chosen

  G

  Enchantment — AuraG

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

  1BB

  Enchantment — AuraB

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

  2G

  Enchantment — AuraG

  Bear Umbra untaps all (or many) permanents, refreshing Careful Cultivation's tap activation.
• Honor-Worn Shaku

  3

  ArtifactC

  Bear Umbra untaps all (or many) permanents, refreshing Honor-Worn Shaku's tap activation.
• Thousand Moons Smithy // Barracks of the Thousand

  2WW

  Legendary Artifact // Legendary Artifact LandW

  Bear Umbra untaps all (or many) permanents, refreshing Thousand Moons Smithy's tap activation.