It's a gorgeous piece of wood, and to bury it in epoxy would be a travesty. I suggest you "sit on it" for a while until the design solidifies in your mind......and, I hesitate to say it, your skill levels catch up with your ambition.
Be aware that elm is not stable. I have a 300 year old piece of elm for my breakfast table, which I made about 20 years ago. It's still moving now.