Wouldn't this always be considered six cards since you hand limit is six?
I have my hand and play Shaman. I have 5 cards in my hand after that. I get 30 points for the cards played and unplayed in my hand (1 played Shaman and 5 in hand). Unless terror cards that go unplayed in your hand don't count....it would always be 30 right?
There are cards that make players discard cards. You could start your turn with 4 cards in which case Shaman only deals 20 points of damage.