Hrolf Krafki is here to make everyone's day better, if he's on their side. Otherwise it is probably going to be a bad day. When Hrolf shows up, if you were his enemy and days are gifts, that day would be socks.
He is equipped with a nasty siege drill.
It is as capable of tearing ceramite and plasteel armour apart as it is shattering the walls of defenses. And once the armour goes, the thing it is protecting isn't going to survive long either.
That is not his only weapon. He also carries a gravity flux bombard.
I'm not exactly sure what this thing does yet, I have until Saturday to figure it out, but I bet it is nasty and happens to a lot of geezers at the same time.