I was wondering if it would be possible (and cool) if people could learn the moves of other people's (just like we learn from animals) while sparring?
It could have a small chance of appearing, even smaller than that with animals - and the person would be limited to the same deck as the other. For example: if John has 4 "Take Aim" and Jack has none, Jack will only be able to get 4 "Take Aim" from John before Take Aim never appears again for him to learn.
Or maybe (to limit it to some extent) just 3/4 or 1/2 of the other person's deck... So if John has 4 "Take Aim", Jack can only learn 3 or 2.
This would be like teaching combat to others, for example.
(And would solve one of Valhalla's problems)