User blog comment:Twilight Despair 5/Supernatural Wants 2/@comment-4860000-20120220151510/@comment-3481504-20120221201814

Okay, well than shoot Special Child Sam Winchester in the heart with a bullet, and he dies, shoot a Leviathan in its host's heart, it lives.

You apparently underestimate the power of indestructibility, it's what makes the Archangels and Horsemen so strong.