(This includes disguise, cloak, and in games involving older cards, morph and manifest, as well as a few other effects that turn cards face down.) Common methods for doing this include using markers or dice, or simply placing them in order on the battlefield
Graveyard decks in particular create an engrossing standoff, since it can be terrifying to risk accidentally accelerating your opponents plan but if you have at least some tech to target the yard, you can also force them to keep their own sequencing a lot tighter than they might be used to
Based on the rules text saying "you may remove a counter," this means if you deal combat damage and only have the hexproof counter, but want to keep it, you can pass on activating the ability
You can either choose to deal three damage to each creature and each planeswalker, or you can destroy all artifacts with a mana value of three or less
Disney Lorcana is about to enter a revolutionary new chapter with its ninth release, Fabled