AWESOME. GENIOUS. GREAT. HOLY. Well, maybe not holy, but you get the point. I really like this idea. It sounds really cool. I am a big Zelda fan, so I've got your back. But, uh...atnocht?
Learn how to spell lol.
JK. It's actually spelled "Atronach" This sounds like a great idea, but you really should plan some more. If you can, make it so you get Mini bosses in the dungeons and stuff and they give you certain items that you need to beat the boss with. Well, that might be a little hard to alter the bosses that much, so just make a very powerfull weapon or armor that helps you greatly, but disapears after you beat the boss. It'd be pretty cool if the very final boss is ganon looking, and then turns into Dagoth Ur, or Lord Vivec (conspiracy idunno), or sumthing. but yeah, keep it up.