Board Game Arena

I've played several runs now, maybe 8 or 10. I got to the first boss twice but still haven't killed him yet. I'm wondering how I should be distributing cards between me and serenade? If I give her no cards, she still acts, but if I give her just 1 card, is it used just once and then it's done? or is...

Twice now, I've lost a game after moving a huge army out of a haven and not realizing there was 1 last enemy troop left in the haven. As soon as you move out your troops, the haven instantly is taken over and you lose the hope points. I understand it's my fault for not remembering there was one troo...