Magic
Witchcraft
noun
The devil's method is magic and witchcraft. That's their method of doing things, after all.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
わぁ、A級の新しい魔法を習得中なの?上手くいけば、すごいね!
Wow, are you learning new A rank magic? If it goes well, that'd be amazing!
An update is needed before you can continue but you have more than one WaniKani tab open.
Finish up what ever you are doing on the other tab(s), then close them to continue.
The update will complete automatically once the other tab(s) are closed.