Your search for "Meltdown 418" revealed the following:
Meltdown - Retro Frame (Foil) (MH3) from Modern Horizons 3, available at 401 Games Canada. Rarity: Uncommon Finish: Foil Artist: Donato Giancola Card Text:Destroy each artifact with mana value X or less.
Meltdown - Retro Frame (MH3) from Modern Horizons 3, available at 401 Games Canada. Rarity: Uncommon Finish: Normal Artist: Donato Giancola Card Text:Destroy each artifact with mana value X or less.
Mementotlan Fusion - OP28-EN010 - Super Rare from OTS Tournament Pack 28, available at 401 Games Canada. Rarity: Super Rare Card Text:During the Main Phase: Fusion Summon 1 Fusion Monster from your Extra Deck, using monsters from your hand or...