I have a question about flipping cards and when you have no cards to discard.

So when you are attacked obviously you flip over a face down card and do the math to determine damage. But what if all of your cards are in the discard pile? Do you ALWAYS just reshuffle the deck and flip a card? Or do you have to wait until it’s your activation again to reshuffle? meaning if you have no cards to flip you just take all the damage.

Thanks!

If you're our of cards to flip and you need to defend yourself, then you must shuffle your discard pile to form a new deck; you then proceed to flip the top card from your deck and calculate damage.

If you're stunned, then you don't bother shuffling your discard pile; you just eat the raw damage. After resolving that attack, however, then you're no longer stunned. If you're attacked again, then you'll be allowed to defend yourself. And since you don't have a deck in front of you, it's time to shuffle your discard pile and create a new deck. Got it? =)