Any of my warrior's cards can't be clicked

I don't know why any of my warrior's attack cards can't be clicked. I really needed to kill that zombie with a Violent Swing.

I tried my Priest's cards and they're "clickable".

Is this a bug? Or am I just not aware of some game rule? Help!

 

I see Brains! in your log. Stun effects are bad.

 

And a tiny bit subtle the first time ^^

 

To be clear:
with a stun effect on him/her the character can't play any non-move card.

 

Yes. So you know, the equivalent "can't play any Move card" effect is Halt.

 

And both of those at the same time make for fun gameplay