A: Killing Time is described as:
If you choose to discard a card instead of playing, you may also choose to discard a second card, and draw one to replace it.

So, Killing Time simply means, at any point during which you might choose to discard –>instead of playing<– you may choose to discard 2 and draw 1. This should leave you with the same number of cards that you started with. (Since the number of cards in your hand is a way of winning, Killing Time should not be a way to achieve this.) The way you Draw & Play in ÜberChrononauts is described as: • Draw 2 cards & add them to your hand • Discard 1 card from your hand • Play 1 card So, if you were Killing Time in ÜberChrononauts, it would look like this: Let's say it's the beginning of the game, and you have a hand of 3 cards • Draw 2 cards and add them to your hand (now you have 5 cards in your hand) • Discard 1 card from your hand (now you have 4 cards, and must either play 1 or discard 1) • Looking at your hand, you decide you don't want to play any of these, you'd rather discard instead, and you choose a card from your hand to discard. (now you have 3 cards in hand) • Since you're deciding to discard –>instead of playing<– you may Kill Time • You discard another card from your hand, and draw to replace it (leaving you with 3 cards in hand) ...and your turn is over. I find it helps to talk out loud describing processes like this, both to make it clear to everyone what I'm doing, and also to assure everyone and myself that I'm doing it right. You could also describe the process like this: • Draw 2 cards and add them to your hand (now you have 5 cards in your hand) • Discard 1 card from your hand (now you have 4 cards, and must either play 1 or discard 1) • Looking at your hand, you decide you don't want to play any of these, you'd rather discard instead. • Since you're deciding to discard –>instead of playing<– you may Kill Time • You discard 2 cards from your hand, and draw 1 (leaving you with 3 cards in hand) ...and your turn is over.