Of relevance here I believe is:

Darklord Superbia
Instant Fusion
Formula Synchron
Compulsory Evacuation Device

Darklord Superbia is of interesting note, as it’s one of the rarer cards in Japan, previously only available as a subscription promo for ordering a subscription for V Jump. Its rarity combined with unscrupulous sales practices by a major card shop chain hyping an Asmodeus/Light and Darkness Dragon/Superbia Deck lead to it being one of the few cards in Japan to cost more than 100 dollars, at least for a time.

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