Confidence:StrongSolidPlausibleTentativeSpeculative

• Elrond, Moon-Reader

  2U

  Legendary Creature — Elf NobleU

  Flowstone Giant has activated abilities that aren't mana abilities, fueling Elrond, Moon-Reader's activation-trigger.
• Rings of Brighthearth

  3

  ArtifactC

  Flowstone Giant has activated abilities that aren't mana abilities, fueling Rings of Brighthearth's activation-trigger.
• Illusionist's Bracers

  2

  Artifact — EquipmentC

  Flowstone Giant has activated abilities that aren't mana abilities, fueling Illusionist's Bracers's activation-trigger.