Confidence:StrongSolidPlausibleTentativeSpeculative

• Hard Evidence

  U

  SorceryU

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

  3B

  Creature — Crab Ooze HorrorB

  Both cards produce the same kind of effect (shared token subtype).
• Specimen Collector

  4U

  Creature — Vedalken WizardU

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

  3

  ArtifactC

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