yugioh master duel why is my deck prohibited

yugioh master duel why is my deck prohibited when I try to play ranked ? I can't see what is wrong : r/masterduel The New MASTER DUEL Forbidden

Name: yugioh master duel why is my deck prohibited when I try to play ranked ? I can't see what is wrong : r/masterduel The New MASTER DUEL Forbidden
Brand: comein.se
SKU: 71876372757
Price: 20.16 USD
Availability: InStock
Rating: 4.3942000000000005 (26 reviews)

SKU: 71876372757

4.4

USD20.16 USD45.16

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Description

Karumonix, the Rat King Thanks to Karumonix, the Rat Kings static ability, you only need to hit a given player with 10 rats to take them out of the game

We have some Pokemon cards that you can look at below, only buy these with your parent's permission if you are under 18

If you were impressed by the value of the previous Rare Candy, then you'll be blown away by the roughly $120 price tag you'll need to pay for a near-mint (NM) copy of this card