Confidence:StrongSolidPlausibleTentativeSpeculative

• Roaming Throne

  4

  Artifact Creature — GolemC

  Roaming Throne makes Lightning Dragon's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Mirror Room // Fractured Realm

  2U5UU

  Enchantment — Room // Enchantment — RoomU

  Mirror Room makes Lightning Dragon's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Wizard's Staff

  1U

  Artifact — EquipmentU

  Wizard's Staff makes Lightning Dragon's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Elrond, Moon-Reader

  2U

  Legendary Creature — Elf NobleU

  Lightning Dragon has activated abilities that aren't mana abilities, fueling Elrond, Moon-Reader's activation-trigger.
• Illusionist's Bracers

  2

  Artifact — EquipmentC

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

  3

  ArtifactC

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