If I were to kneel 3 Training Vessel s in one challenge, do they discard 3 cards, as they each resolve separately? Or do they all attempt to discard the same card? I'm building a discard deck for a friend to play, and I'm putting these and the Motley Crewman in there. If they stack, as in the first case, it seems to me that three of them combined with three Motley Crewmen would discard 12 cards all at once. Is this right? (Kind of a scary thought, lol)

Three different Training Vessels would create 3 separate "discard" effects that would resolve independently (and sequentially) of each other. They would each discard cards, and could each be "enhanced" by Motley Crewman.

12 cards is a scary thought, but it's more of an inventment to get 3x Crewmen and 3x Training Vessels into play at one time than you might think at first glance.

Getting them all into play at once isn't likely, of course, but the potential alone is frightening, lol. Thanks for the response.

I don't exactly remember how, but I once had a friend discard 17 cards off the top of my deck in the first round.

Two or three Naval Escorts. Bunch of other Warships. A Raider. A few other chars with POW icon. Unopposed POW challenge. We take Westeros. Do the math. And it's not that hard to achieve either in the right deck.