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It was never released in either of the two Japanese sets that built Magic Ruler

1, 2024 Can I use this card's [Start of Opponent's Turn] effect to declare a card category such as Digi-Egg cards that can't be placed in decks

However, Revel in Riches is still good in a mono-black deck with plenty of removal spells

Decree of Annihilation Deem Worthy Drannith Stinger Gempalm Incinerator Magmakin Artillerist Quakefoot Cyclops Rampaging War Mammoth Resounding Thunder Sanctuary Smasher Slice and Dice Solar Blast Yidaro, Wandering Monster

Toss in a few token duplication effects and you'll have an army of tokens in no time.