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Not massively powerful but I really like it

Ultimate Ultra Deck 9.6 18 [36363] JP081 D/D/D Flame High King Genghis Fusion Monster Effect Monster - 8 Fiend 2800 2400 1 Level 5 or higher "D/D" monster + 1 "D/D" monster If another "D/D" monster (s) is Normal or Special Summoned to your field while you control this monster (except during the Damage Step): You can target 1 "D/D" monster in your GY

While there are newer versions of Mew ex in Scarlet and Violet sets, this simple art still stands tall

This means that you can swarm the whole field with monsters and maybe even win if you also use a Catapult Turtle card, but you can't play a purely aggro strategy

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