Project Been working on and off for a while… see what can happen when your unemployed for a few days…
Looks quite good already 
You could possibly work on the blade shape, or experimenting with different lighting setups for different effects.
Aligorith
I really like this one. Mostly because it looks like it belongs in one of those 3d-viewers.
Someones been looking at Brian Frouds works!
Looks like a combination of a spike mine and a clam. Looks good though