Confidence:StrongSolidPlausibleTentativeSpeculative

• Penumbra Kavu

  4G

  Creature — KavuG

  Both cards produce the same kind of effect (shared token subtype).
• Rings of Brighthearth

  3

  ArtifactC

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