Cas tells Clarence We're coming. Keep talking so we can find you, but then it appears his effort has been unneeded: they've gone in the right direction already, thanks to providence or just blind luck, or if Cas will grudgingly admit, Dean's tracking skill.

It's also lucky his 'listening channel' is open trying to locate Clarence, or he might not have heard Dean's thought at him. They really need to discuss this sometime soon. He nods at Dean, who then strides loudly forward, and Cas circles around as Dean suggests, making no noise.

Then Dean is pointing his gun at the Shadow, and at the same time, Castiel is behind it and to one side, out of the gun's immediate aim, silent and ready to divest the creature of the pickaxe.