Multiple "Raimei" appear in the background of this card's artwork.
This card's artwork depicts a mushroom cloud, a type of cloud made of debris, smoke, and vapor that forms over the site of a particularly powerful explosion, most infamously those resulting from the detonation of nuclear weapons.
This card's Japanese name, "Last War", is a reference to nuclear warfare, specifically World War III: a hypothetical cataclysmic war that may involve the exchange of hundreds of thermonuclear weapons, causing widespread destruction, massive loss of life, and potentially resulting in a nuclear winter and even an extinction event.
This is reflected in this card's effect to destroy all cards on the field, which would later be used for the unofficial term, "nuking".