After you pay the cost for B'Elanna Torres Creative Engineer to use her ability, can your opponent change their mind and not discard a card, assuming they have a choice?
No, the opponent has committed to discarding a card by the time you use Torres. In a friendly game, if it’s obvious that my opponent forgot I had Torres (rather than is fishing to see if I’ll use her), I’d likely let them take back the action - but if so I’m also not paying for Torres’ ability.
"Save your strength. There'll be another time. The princess - you have to take care of her. You hear me?" -Han Solo to Chewbacca, ESB
Welcome to a universe with endless possibilities. We are the Continuing Committee, an all-volunteer, not-for-profit committee that releases free, printable, virtual sets and organizes tournaments for three Star Trek-themed customizable card games that were originally created by Decipher, Inc.
In the spirit of Infinite Diversity in Infinite Combinations, the Continuing Committee welcomes people of all backgrounds to our community.