Nurgle Titan - bodywork done

Apologies for the crappy pics - lights rubbish today, and there's more going on there than it seems.
So that's the armour and metals done.
I've got it in mind that the "horn" where the severed heads are has a specific function.
During a battle the Titan strides to the front line and any captured enemy are taken up top via the hatch i've put just before the horn starts. They're then led along the gantry before being decapitated in front of the comrades. Just to freak them out. Then the heads are stuck on the spikes. But, if its a very important prisoner, they're killed and hung in the gibbet that'll be dangling down.