Hello. You did not submit the article to which this question refers, which makes it impossible for it to be answered accurately. However, I will try to help you in the best possible way.
It is only possible to find the cause and effect relationship in the article, after reading it. In that case, you should look in the text for the moment when a situation happens as a result of another situation. Therefore, the text must show an element (cause) which, when it happened, caused the creation of another element (effect).
(if) the magician were to get leery warnings about how he can turn bad from using too much power, you would expect for it to (maybe) happen some point during the story.
The principle of holism declares that the whole is more than the sum of its parts. A holistic perspective looks at each component part and how it is connected with one another to create a cohesive whole