Asked him if I could tame it for 1k, he let me, only just managed to make the tame since he was only on around 30% HP when I got there, and by the time my tame completed successfully he had around 5% HP left (I think the guy had DOTed it beforehand and the DOT was breaking the tame, not too sure).
So, recompleted my all-rare and unique stables (plus Chromaggus) once again, though I had to set Shadowclaw free (as the blue has grown on me he's going to stay)

