Board Thread:TV Show Discussion/@comment-1031724-20170828053052/@comment-28895263-20170902050038

KillRoy231 wrote: What about the fact that he has a dragonglass blade embedded in his chest? Or is that a sort of "One Ring" thing, the thing that was used to create it is the only thing (or one of the only two in the Night King's case) that can destroy it? Of course, we don't know. Perhaps the Night King can't be killed; but only laid to rest for 1,000 years.

An alternate battle plan, with better drama but less air-combat realism, would be for Jon to jump off of Rhaegal, to land on wight-Viserion, and swordfight the Night King on his back. Less LOTR, and more Avatar. :-)