I call it the miraculous multiplication of arrows:
First-person only server:
I placed one sharpened stick on the ground, dragged a stack of 20 feathers above it and got a stack of 5 arrows. Oh, and it consumes just one feather! The catch is, if I try to load these arrows by dragging them above the bow, the background of arrows turns red. So I can't load. It might be though, that the bow was already loaded by a former try and I just can't see the magazine as stated above. I haven't tried to shoot because I thought I can't load anyway.