This mod adds functionnality to copper in Minecraft by adding Copper Golems but also a set of tools , a whole new dimension , a new boss with a custom moveset and 2 magic scepters. And more other fun stuff i won't spoil.
Boss music is not mine : https://youtu.be/vklgqFR5P0E?feature=shared , go give him some likes if you've liked it !
Mod has good performance and new tools aren't OP. Works for 1.20.x , 1.19.x with Forge and Geckolib 4 ( untested on higher versions but should work too ).