Mask based on SpecterL’s Mask of Intangibility.[1]
Shoulders based on KhingK’s Mask of Intangibility. [2]
Weapon based on Aztec macuahuitl. If translated to physical part, barbs would be removeable and install alternate barbs.
Original intent of the nui stone was to be similar to an active ball joint mechanism as to embed into the chest and “jam” the gear organs and the nui stone’s energy supercedes normal body mechanism, but was not realized in the piece.
[1]Toa Tuyet sketch
SpecterL's Mask of Intangibility by Rothanak - Thingiverse