can you play with foil cards in tournaments

[Warrior]

can you use foils in magic tournaments?

[Arix]

Yes, but check with your judge first. Because foils tend to bend easier than regular cards, this can often make them easy to spot in a deck. If, for example, all your lands are foil and nothing else, that'll look very dodgy to a judge. So check with the judge first to make sure they're alright. Sleeves help.

[vctrlz]

What if you have all foils?
I like to be stylish. (:

[Arix]

As long as they're not marked in any way, it should be fine.