Isaac coughs for a moment, only just here's Stiles telling him how much longer he has to go and he starts losing the faith he was trying to hold onto.

"It's okay, Stiles. It's alright. Maybe... Maybe Deaton will make it. Who--who'd you text?" He coughs again and manages a few more steps before his legs give out and he drops all his weight onto Stiles shoulders, crying out as the new, sudden movement tears at his stomach and pain flares violently outwards and filling every ounce of his being.