Greatest use of sith alchemy

My vote goes to Ajunta Pall's famous blade. We all know how powerful Ajunta was, yet his sword was so strong in darkness that it was able to consume him. It almost consumed Revan.

Naga Sadow also made some pretty neat amulets.

The greatest uses of Sith Alchemy are the creatures that they have created/enhanced with it: Sithspawn. Leviathans, Terentateks, war mounts, ect.

😖moking: well it could be said that the creation of Anakin was the greatest use of sith alchemy, but since this is pure speculation i'm going to have to say the massasi mutation was the most impressive.