Shots ring out from rifle and then pistol as Marston fires at the darkness, giving cover (he hopes) to Harrick. One shot rings out in response, but smashes the trough and not Marston.
A minute after the house fell, Harrick casts his spell and the area of darkness in the distance fades in a wink. Revealed is a pale gnome glistening with metal. It is difficult in that instant to tell what is what on him. The creature whistles like a steam engine starting. You clearly see a rifle in one hand. Smoke pours off of it, as the sun burns it.
Marston pops up to take a shot and clips the creature. Immediately after getting clipped, the area around the creature begins to fill with smoke pouting off of its body. An area ten feet across is quickly covering in the smoke.
If any of the others want to act, go ahead