www.secretlibrary.info/index.php?lib=1895

stacken de abilities van meerdere disciplines op lam into of kan e maar 1 gebruiken?

You can only use 1.
Similarly to how you need to choose between inferior or superior, but instead you choose between 3 disciplines.

If you want to use multiple disciplines you need www.secretlibrary.info/index.php?lib=2186

What Jonathan said.
The following rule applies to combat cards.

If a combat card seems to good, you're probably reading it wrong

This may also apply to other types of cards, but it's definitely true for combat cards