Confidence:StrongSolidPlausibleTentativeSpeculative

• Archon of Sun's Grace

  2WW

  Creature — ArchonW

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

  8WW

  SorceryW

  Both cards produce the same kind of effect (shared token subtype).
• Pegasus Guardian // Rescue the Foal

  5W1W

  Creature — Pegasus // Instant — AdventureW

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

  1W

  SorceryW

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

  3W

  EnchantmentW

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

  3

  ArtifactC

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