I mean seriously, most enemies on the 13th floor have 7-8 numbered cards. And bosses ALLLLWAYS have stupid 0 cards, so I really can't see where this would be useful.

 

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use that with the Genie Jafar card and they can't break it

Fool. Heck yeah it's useful. 

confusing the enemy before using Ars arcanum

That's one of the best sleights in the game. Just use the Jafar card. 

I mean seriously, most enemies on the 13th floor have 7-8 numbered cards. And bosses ALLLLWAYS have stupid 0 cards, so I really can't see where this would be useful.

 

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DUDE. The trick is, you use the Jafar Enemy card so the bosses cant break the sleight and you can mash the crap out of them easy and kill them.

 

If it annoys you that much, use Lethal Frame sleight instead, it is just as strong as ars arcanum and you can make it have very high number cards for the sleight.