U have a sword, a MAGIC SWORD!! Pick two enchantments.
Personal project. Always wanted to make four arms anatomy. In my opinion, one way it could work is if upper and lower arms act in different planes, fulfilling different functions rather than just duplicating each other.
Lingshi, hao yan on ArtStation at https://www.artstation.com/artwork/Yredd
Primal warrior (4)
Summoning Spell, Noir mutaon on ArtStation at https://www.artstation.com/artwork/wEPEL