Thread:AP24/@comment-43857455-20200528113617/@comment-24595619-20200528210220

The arrows could be another affect of his device similar to Kuraudo's Orochimaru both extending and retracting the length of its blade. Or his arrows could be made by just using his magical power similar to using magic for defense.

I think that magic forest was just for visual effect since there was a lot of things that wasn't inside the manga and light novel, which was just added in the anime.