Is it possible to automate:
when i add a card at the list "x";
Create a new board using template board "x" with the card name, and attach them.
is it possible?
Butler can't natively create new boards, but with a paid Trello account, one of the things you can do is integrate API calls into a Butler command. This way, you can add an action to your command using Trello's API call to create a new board: https://developer.atlassian.com/cloud/trello/rest/api-group-cards/#api-cards-post
It's a little more manual, but that will work!