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You'll need an instance of Babric, which is a loader that the Better Than Adventure community uses for modding the game. (If you have stumbled upon this page without knowing what BTA is, click the blue link and read about it.)
!Steel Arrow !ShotBow
None are known, but if you find one - file a github issue please (:.
Q. Why is it so expensive???
A. Because it's intended to be an endgame weapon for automation modpacks. If you dare to install the mod without any supporting mods, please don't complain about it being "unbalanced". It's an ender game wonderwaffle that you're supposed to work for.

A weapon mod for BTA! or Better than Adventure. First modding project.