• Use this card's effect to send "Gem-Knights" from your Extra Deck to the Graveyard for the effect of "Gem-Knight Master Diamond".
    • Additionally, if there are several Special Summoned monsters on the field, you can send another "Lapis Lazuli" to the Graveyard to inflict the burn damage twice, inflicting a huge amount of damage.
  • You can easily inflict over 2000 damage in one strike with this card; using cards like "Ojama Trio" and "Nightmare Archfiends", you can fill your opponent's field with Special Summoned monsters. Alternatively, you can use cards like "Black Garden" and "House Duston" to fill both players' fields; with 5 Special Summoned monsters for each player, you can inflict 5000 damage.

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