I would be an awesome feature to create a twin of a card which can be embedded within other cards. Any change in one of the twin cards would result in a change in the other card too.
That is planned for the future, but currently not very near (unless upvoted a lot ;).
And thanks for the Naming. I linke the term "Twins". We were discussing about "Clones" and "Mirrors" so far. Any more Suggestions? Which one would you think is easies to understand?