Discard Pile Rules

[Grimbriar]

From the FAQ:

Q. On my turn, we played a bunch of cards into a fight, and the player to my left is a Cleric. He started to put the cards on the discard pile in the order he wanted – is that legal?
A. The player whose turn it is discards everything. If the order is important, he sets that as well.

Also, and this is slightly contradictory

Q. When does a card move from play to discard? For example, if I use a one-shot Item during combat, is it in play during the entire combat or does it immediately move to the discards?
A. The one-shot card does not move to the discards until the battle is over. However, you no longer "own" that card, unless someone plays something to reboot the combat and return all cards to their owners, in which case you resume ownership.

Generally, we play whoever's turn it is keeps going until the say done, or "your turn" or something similar, so they discard before passing the turn to the left.