My arthropod will be based on a giant stick insect from a foreign planet covered in knarly, dark and menacing jungle. The "mace" insect has huge thorn like spikes protruding from it's tail which aid in camouflage and give it a nasty attack. Once subdued, however, it can be used as a makeshift club or mace but the player must be carefull not to allow it to walk away or attack him during combat.
The "mace" insect is for a third person adventure game and can be used as a prop (boobytrap), an enemy, and a weapon. It would be a bit larger than a baseball bat.
Here is a concept sketch:-
And a roughed up mesh needing a lot more detail:-
Let me know what you think?