Spectral appendages is something that came to mind while seeing some of the previous tentacle work.
since tentacles do not have arms there was an effort of using magic/ghost/spectral arms for the purposes.
If you remember the blood champion and the way FX were stretched through multiple markers, you will see how a possessed weapon can be given a magical body to use. :P
By stretching the fx through the markers on the armature there is the potential to give what seems like useless models some functionality with FX.
This model give me the understanding that it can work so if needed I can draw on it in future.
Interesting lil' experiment.