If you don't have an Attack or Curse or 6 cards in hand, can you still buy a Quest to just discard as many cards as you can?
Hmm.. what if you do have an Attack or Curses in hand? Can you discard your entire hand and "trigger" any of the clauses?
Hmm, good question! Let's make it concrete:
Suppose I have nothing but an Ambassador and a Tunnel in hand when I buy Quest. Is it possible for me to gain two Golds?
1. I opt to discard "any six cards".
2. I "do as much as I can", discarding two cards, gaining a Gold for my Tunnel.
3. The Event says "if you do…". If you do what? "Discard an Attack, two Curses, or any six cards". Well, I did that! As it turns out, I discarded an Attack! So I gain Gold from the Event.
…My guess is no, this doesn't work; but I've been wrong before.