Nice spear, you could fire harden the prongs also, would that help or perhaps make the prongs too brittle?
I've not managed to get out to do my challenge and now I have had my awaited surgery and am in a sling for 6 weeks!!! then 3 months apparently until I can resume to normal activities following physio! *sigh*
In the mean time I've got plenty of time to work out how I am going to complete my challenge of making a pint of water safe with only a knife...
I've got a few thoughts though on how:
Use the back edge of the blade with a piece of flint to light something that will catch a spark - amadou, but i don't have any of that so I hope to find something else that might work
else, I'll have to learn hand drill or bow drill to make an ember.
Once I have the ember I'll get the fire going!
Boiling without a pot I have yet to work out but I figured either - boil lots of little batches in many many cabbage leaves or find clay, make pot, fire pot, fill with water, boil
Anyway, just thought I'd explain myself, maybe gather some thoughts on my intended approach!