The battle moved with him. Those humans who rushed in to try and stop him were cut off, cornered, and torn to pieces. A few held their own, for a time, and this often took the form of a cluster of armored shapes surrounded by one or two overeager Valkhounds who quickly learned the taste of blackened steel. A few fell, flesh torn too wide, their carcasses swiftly dissolving into thick black Oil. Inevitably, though, the humans were torn down.
The wall, too. Stone after stone melted away, sputtering with boiling acid, torn by Gravedigger's own claws.
The chaos had spread, both in magic and a literal sense. Black flames rose on one city horizon. The shudder of defiled earth cracked a district to the east. A cackling Valkhound dove down into the water reservoirs, and what had been clear if polluted by the battle now thickened and swirled with black.
The main gate began to creak and tilt as the wall collapsed to its left, Gravedigger's work efficient and effective.
Behind him, there was no organized resistance to attack him, personally. There was one soldier on a secondary wall, though, who had not forgotten his charge. Terrified, he stood his ground, and no one really noticed as he made his way to one of the remaining arbalests. Through the smoke and screams he turned it, aiming, his breath catching and his hands shaking.
He put Gravedigger in his sights as the massive monster tore at the city walls. He aimed down, and fired.
The single bolt, should it strike home, was not enough to kill. Scar, yes, but he'd need a follow-up. He'd need time, to load and fire. He'd need no one to notice him. To stop him.
And in the meantime, his wall was falling. His world was falling. The soldier tried to hold back his despair.
@Gravedigger