Saw this meme, and I realized one detail...

Frieren did not train Fern to use a basic spell though. Frieren went for over 900 years without over using that particular spell. Modern mages might call it basic, but it still is Zoltraak. A spell made by the most badass general of demon army mere 100 years ago.

So, for her it is a shiny new spell. And an extremely efficient at that.

It isn't a bow in a world of modern guns. It is an AK-47 in a world of guns that jam way too often.