Card enhancement inspired by real life casino cheaters

[bronze knoll]

I just watched this video about cheating:
https://www.youtube.com/watch?v=0QWP4IZOu0I
And in it there are a few ways to manipulate cards in there that could give nice advantages to play:

• marked cards: A joker or a consumable that marks a number of cards. Those cards can be read from the back, ie upside down, also making them visible when they are the top card on the deck (and thus the next one to be drawn). Since this doesn't have too much impact, I could see it be a joker, like "Cheater" that marks all cards that are discarded/played/held in hand/all of the above. (edit) additionally they could be the cards that are immune to be debuffed.
• sanded cards: A joker or consumable that gives a number of cards a slight hourglass shape. I think a spectral card would work best for this, since they are rather rare and not Fool-able. Those cards will always be drawn first (because the shape allows for manipulative shuffling). This could be op, but it would be an enhancement, thus making other enhancements impossible like "lucky" and I think that allows for great

[frosty widget]

Sanded seems incredibly strong to me. I also think that marked could be a bit more interesting if it took the seal slot instead of the enhancement slot, and thematically it could be that the seal bleeds through to make it visible.

[supple moon]

I thought sanded would be OP at first until I realized you would need to get 5 of the same spectral card to gain full profit from it, which is perhaps harder than regular deckfixing methods. Though yeah, I agree marked cards are weak, what if it was an enhancement?

Then of course marked cards aren't that useful in the first place as they only serve to partially counter several boss blinds and the top of deck effect is already achievable by looking at misprint in your collection. Marked cards need another effect in order to be any good.