And what is a diferent about willpower 4 and willpower 4 (cumul)?
Like with armor and ward, (cumul.) means it will add to your current willpower value. If it is not cumul, you'll just have the amount of willpower on the charm (unless you already had more than that, in which case nothing happens).
Situation: you have 2 willpower.
Case 1: you play a charm doing 4 willpower: you'll have a total of 4 willpower at the end of the turn.
Then if you play the same charm again, your willpower will still be 4.
Case 2: you play a charm doing 4 willpower (cumul.): you will have 2+4 = 6 willpower at the end of the turn.
You play it again and you will have a total of 6+4 = 10 willpower.
Also, the
wiki is very useful too, you'll find a lot of answers there.
