When a gem activates from Crown of Convergence, there is no way to tell which color that gem was. This is problematic because both activations ask you to fetch one of two cards and have an effect only if the card fetched matches the activated gem. When the pop-up comes up, you have no way of knowing whether you need to fetch a white or green card.
The only way to tell right now is to pay attention to the board at the time the gem is activated, but even that isn’t a good solution because you could acitvate multiple gems at the same time.
For some reason, when it promps you to fetch a card, it has both activation texts in there, this could easily be solved by only showing the relevant text.
//Edited Title - Tombstone