I wondered the same thing myself. It seems like it should go back in your deck since it is a card that is in your deck, so when you reshuffle, it should be there again.
When I use Reshuffle on myself, would I get reshuffle back in my deck?
I don't know for sure if this has already been asked or not. :?
I don't need know what it is, just if it comes back in your deck.
~Eric CrowSpear - Lvl 79
Yes sir it most certainly does get reshuffled back into your deck. I am currently using a Necklace that gives me one copy and I have for sure seen it come back after I used it.
Reshuffle basically puts all the cards you've used and/or discarded back into your deck so you can use them again, which includes the lone reshuffle itself. Most players usually carry 2 reshuffles, so they can discard one and then use the other one when they need to, sort of like having an infinite deck so-to-speak.