The headline Beast Frustrated Designer card funnels the big guys vexation at your Item cards by saccing them for big damage, while its counterpart in Belle Mechanic Extraordinaire salvages and repurposes the same discarded items for a cheaper cost to play and some big Lore gains
In the case of Vanellope, she reduces the Strength of all opposing characters by 1, for one turn, every time you play another Princess character
Some Vault cards may have a raised foil effect, like the Gilded Foil treatment from Streets of New Capenna
You must use actual dice, although the dice don't have to be six-sided, nor do they all have to be the same size
Since Hidden Strings can twiddle twice and untap your Voltaic Key, well, you can feel the shenanigans