Van Gogh

That's one more reason to take away the use of his legs. So he can't walk out of that cave. He's still free in more ways than not. His mind can leave the cave even when his body cannot. He will have to find another wolf to mate with when the hormones kick in.

Yes Yes The white walkers have their own magic weapons too. This one shatters iron. Good point I don't think Lightbringer is in Westeros and Jon is not Azor Ahai. LB is a glass candle. Its light may have special properties which simulate natural sunlight.