Keris Information Requested

[gunk]

Hello,

I was at a gun show over the weekend and ran across a very old-looking and unique-looking knife. I found a post on this forum that had information about a very similar piece and I thought I'd post a few images in hopes to find out more information about this piece in particular. I'd love to know what I have, the history, and if it should be appraised for insurance purposes. I also found another website that mentions that Keris knives may have a spiritual connection and you need to "feed" it's spirit. I don't generally believe in that sort of stuff, but I don't want to infuriate a magical knife :-) Any information on what I have and how to care for it would be greatly appreciated. I saw it and grabbed it since I've never seen anything like this before and thought it would be a really cool item to display in my home. I really love native/primitive artwork and I thought this was a nice piece to have. Any information would be appreciated since I'm not a collector of these types of knives.