Confidence:StrongSolidPlausibleTentativeSpeculative

• Mirror Room // Fractured Realm

  2U5UU

  Enchantment — Room // Enchantment — RoomU

  Mirror Room makes Rings of Brighthearth's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Echoes of Eternity

  3CCC

  Kindred Enchantment — EldraziC

  Echoes of Eternity makes Rings of Brighthearth's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Time Vault

  2

  ArtifactC

  Time Vault has activated abilities that aren't mana abilities, fueling Rings of Brighthearth's activation-trigger.
• Sensei's Divining Top

  1

  ArtifactC

  Sensei's Divining Top has activated abilities that aren't mana abilities, fueling Rings of Brighthearth's activation-trigger.
• Ajani, Nacatl Pariah // Ajani, Nacatl Avenger

  1W

  Legendary Creature — Cat Warrior // Legendary Planeswalker — AjaniRW

  Ajani, Nacatl Pariah has activated abilities that aren't mana abilities, fueling Rings of Brighthearth's activation-trigger.
• Tamiyo, Inquisitive Student // Tamiyo, Seasoned Scholar

  U

  Legendary Creature — Moonfolk Wizard // Legendary Planeswalker — TamiyoGU

  Tamiyo, Inquisitive Student has activated abilities that aren't mana abilities, fueling Rings of Brighthearth's activation-trigger.
• Vivien, Monsters' Advocate

  3GG

  Legendary Planeswalker — VivienG

  Vivien, Monsters' Advocate has activated abilities that aren't mana abilities, fueling Rings of Brighthearth's activation-trigger.
• Karn, Scion of Urza

  4

  Legendary Planeswalker — KarnC

  Karn, Scion of Urza has activated abilities that aren't mana abilities, fueling Rings of Brighthearth's activation-trigger.
• The Theorist, Jace Beleren

  2UU

  Legendary Planeswalker — JaceU

  The Theorist, Jace Beleren has activated abilities that aren't mana abilities, fueling Rings of Brighthearth's activation-trigger.
• Dauthi Voidwalker

  BB

  Creature — Dauthi RogueB

  Dauthi Voidwalker has activated abilities that aren't mana abilities, fueling Rings of Brighthearth's activation-trigger.
• Koma, Cosmos Serpent

  3GGUU

  Legendary Creature — SerpentGU

  Koma, Cosmos Serpent has activated abilities that aren't mana abilities, fueling Rings of Brighthearth's activation-trigger.
• Minsc & Boo, Timeless Heroes

  2RG

  Legendary Planeswalker — MinscGR

  Minsc & Boo, Timeless Heroes has activated abilities that aren't mana abilities, fueling Rings of Brighthearth's activation-trigger.
• Garruk, Primal Hunter

  2GGG

  Legendary Planeswalker — GarrukG

  Garruk, Primal Hunter has activated abilities that aren't mana abilities, fueling Rings of Brighthearth's activation-trigger.
• Master of the Wild Hunt

  2GG

  Creature — Human ShamanG

  Master of the Wild Hunt has activated abilities that aren't mana abilities, fueling Rings of Brighthearth's activation-trigger.
• Oko, Thief of Crowns

  1GU

  Legendary Planeswalker — OkoGU

  Oko, Thief of Crowns has activated abilities that aren't mana abilities, fueling Rings of Brighthearth's activation-trigger.
• Ugin, Eye of the Storms

  7

  Legendary Planeswalker — UginC

  Ugin, Eye of the Storms has activated abilities that aren't mana abilities, fueling Rings of Brighthearth's activation-trigger.
• Jace, Wielder of Mysteries

  1UUU

  Legendary Planeswalker — JaceU

  Jace, Wielder of Mysteries has activated abilities that aren't mana abilities, fueling Rings of Brighthearth's activation-trigger.
• Sapling Nursery

  6GG

  EnchantmentG

  Sapling Nursery has activated abilities that aren't mana abilities, fueling Rings of Brighthearth's activation-trigger.
• The Soul Stone

  1B

  Legendary Artifact — Infinity StoneB

  The Soul Stone has activated abilities that aren't mana abilities, fueling Rings of Brighthearth's activation-trigger.
• Xu-Ifit, Osteoharmonist

  1BB

  Legendary Creature — Human WizardB

  Xu-Ifit, Osteoharmonist has activated abilities that aren't mana abilities, fueling Rings of Brighthearth's activation-trigger.
• Garruk, Cursed Huntsman

  4BG

  Legendary Planeswalker — GarrukBG

  Garruk, Cursed Huntsman has activated abilities that aren't mana abilities, fueling Rings of Brighthearth's activation-trigger.
• Jared Carthalion

  WUBRG

  Legendary Planeswalker — JaredBGRUW

  Jared Carthalion has activated abilities that aren't mana abilities, fueling Rings of Brighthearth's activation-trigger.
• Raff, Weatherlight Stalwart

  WU

  Legendary Creature — Human WizardUW

  Raff, Weatherlight Stalwart has activated abilities that aren't mana abilities, fueling Rings of Brighthearth's activation-trigger.
• Shaile, Dean of Radiance // Embrose, Dean of Shadow

  1W2BB

  Legendary Creature — Bird Cleric // Legendary Creature — Human WarlockBW

  Shaile, Dean of Radiance has activated abilities that aren't mana abilities, fueling Rings of Brighthearth's activation-trigger.
• Merieke Ri Berit

  WUB

  Legendary Creature — HumanBUW

  Merieke Ri Berit has activated abilities that aren't mana abilities, fueling Rings of Brighthearth's activation-trigger.