This is the Amethyst Mod made by MCrafterzz ported for 1.16. 
P.S. This was ported over from Intermediary mappings to Yarn so it is possible i may have made a mistake in the remapping and could cause random bugs / unforeseen crashes. Just tell me in the comments and i'll figure it out!
Source is available at https://github.com/PhoenixVX/Amethyst-Mod-1.16