Flipping during play are really interesting cards, some good ones have been thought out! What about something that flips once?
"Great shot, kid!" - 0 or 1 points, EPT, unique
Side A: When attacking before defender's dice are rolled: add 2 critical hits to your attack roll. Defender adds one green die this attack. Flip this card to the other side after the attack.
Side B: -1 die to all your attacks
So you could have a one-in-a-million shot to kill something, but then you're so smug about it the rest of your shots are affected by it. This is probably a very bad card for this alpha-strike meta, but maybe an interesting tradeoff and card design!
Edited by jonnyd